2008-07-14 23:08:37 +07:00
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/*
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* This file is part of UBIFS.
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*
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* Copyright (C) 2006-2008 Nokia Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Authors: Adrian Hunter
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* Artem Bityutskiy (Битюцкий Артём)
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*/
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/*
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* This file implements the budgeting sub-system which is responsible for UBIFS
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* space management.
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*
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* Factors such as compression, wasted space at the ends of LEBs, space in other
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* journal heads, the effect of updates on the index, and so on, make it
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* impossible to accurately predict the amount of space needed. Consequently
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* approximations are used.
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*/
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#include "ubifs.h"
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#include <linux/writeback.h>
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2008-12-18 19:06:51 +07:00
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#include <linux/math64.h>
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2008-07-14 23:08:37 +07:00
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/*
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* When pessimistic budget calculations say that there is no enough space,
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* UBIFS starts writing back dirty inodes and pages, doing garbage collection,
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2008-12-09 23:04:40 +07:00
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* or committing. The below constant defines maximum number of times UBIFS
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2008-07-14 23:08:37 +07:00
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* repeats the operations.
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*/
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2008-12-09 23:04:40 +07:00
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#define MAX_MKSPC_RETRIES 3
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2008-07-14 23:08:37 +07:00
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/*
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* The below constant defines amount of dirty pages which should be written
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* back at when trying to shrink the liability.
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*/
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#define NR_TO_WRITE 16
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/**
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* shrink_liability - write-back some dirty pages/inodes.
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* @c: UBIFS file-system description object
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* @nr_to_write: how many dirty pages to write-back
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*
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* This function shrinks UBIFS liability by means of writing back some amount
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2009-09-16 20:13:54 +07:00
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* of dirty inodes and their pages.
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2008-07-14 23:08:37 +07:00
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*
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* Note, this function synchronizes even VFS inodes which are locked
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* (@i_mutex) by the caller of the budgeting function, because write-back does
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* not touch @i_mutex.
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*/
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2009-09-16 20:13:54 +07:00
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static void shrink_liability(struct ubifs_info *c, int nr_to_write)
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2008-07-14 23:08:37 +07:00
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{
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2010-06-08 23:14:51 +07:00
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down_read(&c->vfs_sb->s_umount);
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2011-10-08 10:54:10 +07:00
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writeback_inodes_sb(c->vfs_sb, WB_REASON_FS_FREE_SPACE);
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2010-06-08 23:14:51 +07:00
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up_read(&c->vfs_sb->s_umount);
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2008-07-14 23:08:37 +07:00
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}
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/**
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* run_gc - run garbage collector.
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* @c: UBIFS file-system description object
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*
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* This function runs garbage collector to make some more free space. Returns
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* zero if a free LEB has been produced, %-EAGAIN if commit is required, and a
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* negative error code in case of failure.
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*/
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static int run_gc(struct ubifs_info *c)
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{
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int err, lnum;
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/* Make some free space by garbage-collecting dirty space */
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down_read(&c->commit_sem);
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lnum = ubifs_garbage_collect(c, 1);
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up_read(&c->commit_sem);
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if (lnum < 0)
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return lnum;
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/* GC freed one LEB, return it to lprops */
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dbg_budg("GC freed LEB %d", lnum);
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err = ubifs_return_leb(c, lnum);
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if (err)
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return err;
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return 0;
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}
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2008-12-09 23:04:40 +07:00
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/**
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* get_liability - calculate current liability.
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* @c: UBIFS file-system description object
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*
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* This function calculates and returns current UBIFS liability, i.e. the
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* amount of bytes UBIFS has "promised" to write to the media.
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*/
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static long long get_liability(struct ubifs_info *c)
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{
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long long liab;
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spin_lock(&c->space_lock);
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2011-03-29 22:04:05 +07:00
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liab = c->bi.idx_growth + c->bi.data_growth + c->bi.dd_growth;
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2008-12-09 23:04:40 +07:00
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spin_unlock(&c->space_lock);
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return liab;
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}
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2008-07-14 23:08:37 +07:00
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/**
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* make_free_space - make more free space on the file-system.
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* @c: UBIFS file-system description object
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*
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* This function is called when an operation cannot be budgeted because there
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* is supposedly no free space. But in most cases there is some free space:
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2008-10-17 00:02:37 +07:00
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* o budgeting is pessimistic, so it always budgets more than it is actually
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2008-07-14 23:08:37 +07:00
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* needed, so shrinking the liability is one way to make free space - the
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* cached data will take less space then it was budgeted for;
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* o GC may turn some dark space into free space (budgeting treats dark space
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* as not available);
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* o commit may free some LEB, i.e., turn freeable LEBs into free LEBs.
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*
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* So this function tries to do the above. Returns %-EAGAIN if some free space
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* was presumably made and the caller has to re-try budgeting the operation.
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* Returns %-ENOSPC if it couldn't do more free space, and other negative error
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* codes on failures.
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*/
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2008-12-09 23:04:40 +07:00
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static int make_free_space(struct ubifs_info *c)
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2008-07-14 23:08:37 +07:00
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{
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2008-12-09 23:04:40 +07:00
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int err, retries = 0;
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long long liab1, liab2;
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2008-07-14 23:08:37 +07:00
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2008-12-09 23:04:40 +07:00
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do {
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liab1 = get_liability(c);
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/*
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* We probably have some dirty pages or inodes (liability), try
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* to write them back.
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*/
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dbg_budg("liability %lld, run write-back", liab1);
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shrink_liability(c, NR_TO_WRITE);
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2008-07-14 23:08:37 +07:00
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2008-12-09 23:04:40 +07:00
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liab2 = get_liability(c);
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if (liab2 < liab1)
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return -EAGAIN;
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2008-07-14 23:08:37 +07:00
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2011-03-31 08:57:33 +07:00
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dbg_budg("new liability %lld (not shrunk)", liab2);
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2008-07-14 23:08:37 +07:00
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2008-12-09 23:04:40 +07:00
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/* Liability did not shrink again, try GC */
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dbg_budg("Run GC");
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2008-07-14 23:08:37 +07:00
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err = run_gc(c);
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if (!err)
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return -EAGAIN;
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2008-12-09 23:04:40 +07:00
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if (err != -EAGAIN && err != -ENOSPC)
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/* Some real error happened */
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2008-07-14 23:08:37 +07:00
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return err;
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2008-12-09 23:04:40 +07:00
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dbg_budg("Run commit (retries %d)", retries);
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2008-07-14 23:08:37 +07:00
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err = ubifs_run_commit(c);
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if (err)
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return err;
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2008-12-09 23:04:40 +07:00
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} while (retries++ < MAX_MKSPC_RETRIES);
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2008-07-14 23:08:37 +07:00
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return -ENOSPC;
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}
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/**
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2009-03-16 14:56:57 +07:00
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* ubifs_calc_min_idx_lebs - calculate amount of LEBs for the index.
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2008-07-14 23:08:37 +07:00
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* @c: UBIFS file-system description object
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*
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2009-03-16 14:56:57 +07:00
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* This function calculates and returns the number of LEBs which should be kept
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* for index usage.
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2008-07-14 23:08:37 +07:00
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*/
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int ubifs_calc_min_idx_lebs(struct ubifs_info *c)
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{
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2009-03-16 14:56:57 +07:00
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int idx_lebs;
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2008-12-18 19:06:51 +07:00
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long long idx_size;
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2008-07-14 23:08:37 +07:00
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2011-03-29 22:04:05 +07:00
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idx_size = c->bi.old_idx_sz + c->bi.idx_growth + c->bi.uncommitted_idx;
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2008-07-30 16:18:02 +07:00
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/* And make sure we have thrice the index size of space reserved */
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2009-03-16 14:56:57 +07:00
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idx_size += idx_size << 1;
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2008-07-14 23:08:37 +07:00
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/*
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* We do not maintain 'old_idx_size' as 'old_idx_lebs'/'old_idx_bytes'
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* pair, nor similarly the two variables for the new index size, so we
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* have to do this costly 64-bit division on fast-path.
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*/
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2009-03-16 14:56:57 +07:00
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idx_lebs = div_u64(idx_size + c->idx_leb_size - 1, c->idx_leb_size);
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2008-07-14 23:08:37 +07:00
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/*
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* The index head is not available for the in-the-gaps method, so add an
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* extra LEB to compensate.
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*/
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2008-12-18 19:06:51 +07:00
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idx_lebs += 1;
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if (idx_lebs < MIN_INDEX_LEBS)
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idx_lebs = MIN_INDEX_LEBS;
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return idx_lebs;
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2008-07-14 23:08:37 +07:00
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}
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/**
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* ubifs_calc_available - calculate available FS space.
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* @c: UBIFS file-system description object
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* @min_idx_lebs: minimum number of LEBs reserved for the index
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*
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* This function calculates and returns amount of FS space available for use.
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*/
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long long ubifs_calc_available(const struct ubifs_info *c, int min_idx_lebs)
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{
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int subtract_lebs;
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long long available;
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available = c->main_bytes - c->lst.total_used;
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/*
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* Now 'available' contains theoretically available flash space
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* assuming there is no index, so we have to subtract the space which
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* is reserved for the index.
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*/
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subtract_lebs = min_idx_lebs;
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/* Take into account that GC reserves one LEB for its own needs */
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subtract_lebs += 1;
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/*
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* The GC journal head LEB is not really accessible. And since
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* different write types go to different heads, we may count only on
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* one head's space.
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*/
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subtract_lebs += c->jhead_cnt - 1;
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/* We also reserve one LEB for deletions, which bypass budgeting */
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subtract_lebs += 1;
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available -= (long long)subtract_lebs * c->leb_size;
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/* Subtract the dead space which is not available for use */
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available -= c->lst.total_dead;
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/*
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* Subtract dark space, which might or might not be usable - it depends
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* on the data which we have on the media and which will be written. If
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* this is a lot of uncompressed or not-compressible data, the dark
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* space cannot be used.
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*/
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available -= c->lst.total_dark;
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/*
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* However, there is more dark space. The index may be bigger than
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* @min_idx_lebs. Those extra LEBs are assumed to be available, but
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* their dark space is not included in total_dark, so it is subtracted
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* here.
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*/
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if (c->lst.idx_lebs > min_idx_lebs) {
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subtract_lebs = c->lst.idx_lebs - min_idx_lebs;
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available -= subtract_lebs * c->dark_wm;
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}
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/* The calculations are rough and may end up with a negative number */
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return available > 0 ? available : 0;
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}
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/**
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* can_use_rp - check whether the user is allowed to use reserved pool.
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* @c: UBIFS file-system description object
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*
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* UBIFS has so-called "reserved pool" which is flash space reserved
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* for the superuser and for uses whose UID/GID is recorded in UBIFS superblock.
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* This function checks whether current user is allowed to use reserved pool.
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* Returns %1 current user is allowed to use reserved pool and %0 otherwise.
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*/
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static int can_use_rp(struct ubifs_info *c)
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{
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2012-02-08 06:50:56 +07:00
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if (uid_eq(current_fsuid(), c->rp_uid) || capable(CAP_SYS_RESOURCE) ||
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(!gid_eq(c->rp_gid, GLOBAL_ROOT_GID) && in_group_p(c->rp_gid)))
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2008-07-14 23:08:37 +07:00
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return 1;
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return 0;
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}
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/**
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* do_budget_space - reserve flash space for index and data growth.
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* @c: UBIFS file-system description object
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*
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2009-03-16 14:56:57 +07:00
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* This function makes sure UBIFS has enough free LEBs for index growth and
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|
|
* data.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
*
|
2008-07-30 16:18:02 +07:00
|
|
|
|
* When budgeting index space, UBIFS reserves thrice as many LEBs as the index
|
2008-07-14 23:08:37 +07:00
|
|
|
|
* would take if it was consolidated and written to the flash. This guarantees
|
|
|
|
|
* that the "in-the-gaps" commit method always succeeds and UBIFS will always
|
|
|
|
|
* be able to commit dirty index. So this function basically adds amount of
|
2008-07-25 18:38:51 +07:00
|
|
|
|
* budgeted index space to the size of the current index, multiplies this by 3,
|
2009-03-16 14:56:57 +07:00
|
|
|
|
* and makes sure this does not exceed the amount of free LEBs.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
*
|
2011-03-29 22:04:05 +07:00
|
|
|
|
* Notes about @c->bi.min_idx_lebs and @c->lst.idx_lebs variables:
|
2008-07-14 23:08:37 +07:00
|
|
|
|
* o @c->lst.idx_lebs is the number of LEBs the index currently uses. It might
|
|
|
|
|
* be large, because UBIFS does not do any index consolidation as long as
|
|
|
|
|
* there is free space. IOW, the index may take a lot of LEBs, but the LEBs
|
|
|
|
|
* will contain a lot of dirt.
|
2011-03-29 22:04:05 +07:00
|
|
|
|
* o @c->bi.min_idx_lebs is the number of LEBS the index presumably takes. IOW,
|
|
|
|
|
* the index may be consolidated to take up to @c->bi.min_idx_lebs LEBs.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
*
|
|
|
|
|
* This function returns zero in case of success, and %-ENOSPC in case of
|
|
|
|
|
* failure.
|
|
|
|
|
*/
|
|
|
|
|
static int do_budget_space(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
long long outstanding, available;
|
|
|
|
|
int lebs, rsvd_idx_lebs, min_idx_lebs;
|
|
|
|
|
|
|
|
|
|
/* First budget index space */
|
|
|
|
|
min_idx_lebs = ubifs_calc_min_idx_lebs(c);
|
|
|
|
|
|
|
|
|
|
/* Now 'min_idx_lebs' contains number of LEBs to reserve */
|
|
|
|
|
if (min_idx_lebs > c->lst.idx_lebs)
|
|
|
|
|
rsvd_idx_lebs = min_idx_lebs - c->lst.idx_lebs;
|
|
|
|
|
else
|
|
|
|
|
rsvd_idx_lebs = 0;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The number of LEBs that are available to be used by the index is:
|
|
|
|
|
*
|
|
|
|
|
* @c->lst.empty_lebs + @c->freeable_cnt + @c->idx_gc_cnt -
|
|
|
|
|
* @c->lst.taken_empty_lebs
|
|
|
|
|
*
|
2008-08-20 15:56:33 +07:00
|
|
|
|
* @c->lst.empty_lebs are available because they are empty.
|
|
|
|
|
* @c->freeable_cnt are available because they contain only free and
|
|
|
|
|
* dirty space, @c->idx_gc_cnt are available because they are index
|
|
|
|
|
* LEBs that have been garbage collected and are awaiting the commit
|
|
|
|
|
* before they can be used. And the in-the-gaps method will grab these
|
|
|
|
|
* if it needs them. @c->lst.taken_empty_lebs are empty LEBs that have
|
|
|
|
|
* already been allocated for some purpose.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
*
|
2008-08-20 15:56:33 +07:00
|
|
|
|
* Note, @c->idx_gc_cnt is included to both @c->lst.empty_lebs (because
|
|
|
|
|
* these LEBs are empty) and to @c->lst.taken_empty_lebs (because they
|
|
|
|
|
* are taken until after the commit).
|
|
|
|
|
*
|
|
|
|
|
* Note, @c->lst.taken_empty_lebs may temporarily be higher by one
|
|
|
|
|
* because of the way we serialize LEB allocations and budgeting. See a
|
|
|
|
|
* comment in 'ubifs_find_free_space()'.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
*/
|
|
|
|
|
lebs = c->lst.empty_lebs + c->freeable_cnt + c->idx_gc_cnt -
|
|
|
|
|
c->lst.taken_empty_lebs;
|
|
|
|
|
if (unlikely(rsvd_idx_lebs > lebs)) {
|
2012-08-27 17:34:09 +07:00
|
|
|
|
dbg_budg("out of indexing space: min_idx_lebs %d (old %d), rsvd_idx_lebs %d",
|
|
|
|
|
min_idx_lebs, c->bi.min_idx_lebs, rsvd_idx_lebs);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
return -ENOSPC;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
available = ubifs_calc_available(c, min_idx_lebs);
|
2011-03-29 22:04:05 +07:00
|
|
|
|
outstanding = c->bi.data_growth + c->bi.dd_growth;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
|
|
|
|
if (unlikely(available < outstanding)) {
|
|
|
|
|
dbg_budg("out of data space: available %lld, outstanding %lld",
|
|
|
|
|
available, outstanding);
|
|
|
|
|
return -ENOSPC;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (available - outstanding <= c->rp_size && !can_use_rp(c))
|
|
|
|
|
return -ENOSPC;
|
|
|
|
|
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.min_idx_lebs = min_idx_lebs;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* calc_idx_growth - calculate approximate index growth from budgeting request.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @req: budgeting request
|
|
|
|
|
*
|
|
|
|
|
* For now we assume each new node adds one znode. But this is rather poor
|
|
|
|
|
* approximation, though.
|
|
|
|
|
*/
|
|
|
|
|
static int calc_idx_growth(const struct ubifs_info *c,
|
|
|
|
|
const struct ubifs_budget_req *req)
|
|
|
|
|
{
|
|
|
|
|
int znodes;
|
|
|
|
|
|
|
|
|
|
znodes = req->new_ino + (req->new_page << UBIFS_BLOCKS_PER_PAGE_SHIFT) +
|
|
|
|
|
req->new_dent;
|
|
|
|
|
return znodes * c->max_idx_node_sz;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* calc_data_growth - calculate approximate amount of new data from budgeting
|
|
|
|
|
* request.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @req: budgeting request
|
|
|
|
|
*/
|
|
|
|
|
static int calc_data_growth(const struct ubifs_info *c,
|
|
|
|
|
const struct ubifs_budget_req *req)
|
|
|
|
|
{
|
|
|
|
|
int data_growth;
|
|
|
|
|
|
2011-03-29 22:04:05 +07:00
|
|
|
|
data_growth = req->new_ino ? c->bi.inode_budget : 0;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
if (req->new_page)
|
2011-03-29 22:04:05 +07:00
|
|
|
|
data_growth += c->bi.page_budget;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
if (req->new_dent)
|
2011-03-29 22:04:05 +07:00
|
|
|
|
data_growth += c->bi.dent_budget;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
data_growth += req->new_ino_d;
|
|
|
|
|
return data_growth;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* calc_dd_growth - calculate approximate amount of data which makes other data
|
|
|
|
|
* dirty from budgeting request.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @req: budgeting request
|
|
|
|
|
*/
|
|
|
|
|
static int calc_dd_growth(const struct ubifs_info *c,
|
|
|
|
|
const struct ubifs_budget_req *req)
|
|
|
|
|
{
|
|
|
|
|
int dd_growth;
|
|
|
|
|
|
2011-03-29 22:04:05 +07:00
|
|
|
|
dd_growth = req->dirtied_page ? c->bi.page_budget : 0;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
|
|
|
|
if (req->dirtied_ino)
|
2011-03-29 22:04:05 +07:00
|
|
|
|
dd_growth += c->bi.inode_budget << (req->dirtied_ino - 1);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
if (req->mod_dent)
|
2011-03-29 22:04:05 +07:00
|
|
|
|
dd_growth += c->bi.dent_budget;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
dd_growth += req->dirtied_ino_d;
|
|
|
|
|
return dd_growth;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_budget_space - ensure there is enough space to complete an operation.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @req: budget request
|
|
|
|
|
*
|
|
|
|
|
* This function allocates budget for an operation. It uses pessimistic
|
|
|
|
|
* approximation of how much flash space the operation needs. The goal of this
|
|
|
|
|
* function is to make sure UBIFS always has flash space to flush all dirty
|
|
|
|
|
* pages, dirty inodes, and dirty znodes (liability). This function may force
|
|
|
|
|
* commit, garbage-collection or write-back. Returns zero in case of success,
|
|
|
|
|
* %-ENOSPC if there is no free space and other negative error codes in case of
|
|
|
|
|
* failures.
|
|
|
|
|
*/
|
|
|
|
|
int ubifs_budget_space(struct ubifs_info *c, struct ubifs_budget_req *req)
|
|
|
|
|
{
|
2008-12-09 23:04:40 +07:00
|
|
|
|
int err, idx_growth, data_growth, dd_growth, retried = 0;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
2008-07-24 18:42:05 +07:00
|
|
|
|
ubifs_assert(req->new_page <= 1);
|
|
|
|
|
ubifs_assert(req->dirtied_page <= 1);
|
|
|
|
|
ubifs_assert(req->new_dent <= 1);
|
|
|
|
|
ubifs_assert(req->mod_dent <= 1);
|
|
|
|
|
ubifs_assert(req->new_ino <= 1);
|
|
|
|
|
ubifs_assert(req->new_ino_d <= UBIFS_MAX_INO_DATA);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
ubifs_assert(req->dirtied_ino <= 4);
|
|
|
|
|
ubifs_assert(req->dirtied_ino_d <= UBIFS_MAX_INO_DATA * 4);
|
2008-07-24 18:52:45 +07:00
|
|
|
|
ubifs_assert(!(req->new_ino_d & 7));
|
|
|
|
|
ubifs_assert(!(req->dirtied_ino_d & 7));
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
|
|
|
|
data_growth = calc_data_growth(c, req);
|
|
|
|
|
dd_growth = calc_dd_growth(c, req);
|
|
|
|
|
if (!data_growth && !dd_growth)
|
|
|
|
|
return 0;
|
|
|
|
|
idx_growth = calc_idx_growth(c, req);
|
|
|
|
|
|
|
|
|
|
again:
|
|
|
|
|
spin_lock(&c->space_lock);
|
2011-03-29 22:04:05 +07:00
|
|
|
|
ubifs_assert(c->bi.idx_growth >= 0);
|
|
|
|
|
ubifs_assert(c->bi.data_growth >= 0);
|
|
|
|
|
ubifs_assert(c->bi.dd_growth >= 0);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
2011-03-29 22:04:05 +07:00
|
|
|
|
if (unlikely(c->bi.nospace) && (c->bi.nospace_rp || !can_use_rp(c))) {
|
2008-07-14 23:08:37 +07:00
|
|
|
|
dbg_budg("no space");
|
|
|
|
|
spin_unlock(&c->space_lock);
|
|
|
|
|
return -ENOSPC;
|
|
|
|
|
}
|
|
|
|
|
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.idx_growth += idx_growth;
|
|
|
|
|
c->bi.data_growth += data_growth;
|
|
|
|
|
c->bi.dd_growth += dd_growth;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
|
|
|
|
err = do_budget_space(c);
|
|
|
|
|
if (likely(!err)) {
|
|
|
|
|
req->idx_growth = idx_growth;
|
|
|
|
|
req->data_growth = data_growth;
|
|
|
|
|
req->dd_growth = dd_growth;
|
|
|
|
|
spin_unlock(&c->space_lock);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Restore the old values */
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.idx_growth -= idx_growth;
|
|
|
|
|
c->bi.data_growth -= data_growth;
|
|
|
|
|
c->bi.dd_growth -= dd_growth;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
spin_unlock(&c->space_lock);
|
|
|
|
|
|
|
|
|
|
if (req->fast) {
|
|
|
|
|
dbg_budg("no space for fast budgeting");
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
2008-12-09 23:04:40 +07:00
|
|
|
|
err = make_free_space(c);
|
|
|
|
|
cond_resched();
|
2008-07-14 23:08:37 +07:00
|
|
|
|
if (err == -EAGAIN) {
|
|
|
|
|
dbg_budg("try again");
|
|
|
|
|
goto again;
|
|
|
|
|
} else if (err == -ENOSPC) {
|
2008-12-09 23:04:40 +07:00
|
|
|
|
if (!retried) {
|
|
|
|
|
retried = 1;
|
|
|
|
|
dbg_budg("-ENOSPC, but anyway try once again");
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
2008-07-14 23:08:37 +07:00
|
|
|
|
dbg_budg("FS is full, -ENOSPC");
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.nospace = 1;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
if (can_use_rp(c) || c->rp_size == 0)
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.nospace_rp = 1;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
smp_wmb();
|
|
|
|
|
} else
|
|
|
|
|
ubifs_err("cannot budget space, error %d", err);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_release_budget - release budgeted free space.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @req: budget request
|
|
|
|
|
*
|
|
|
|
|
* This function releases the space budgeted by 'ubifs_budget_space()'. Note,
|
|
|
|
|
* since the index changes (which were budgeted for in @req->idx_growth) will
|
|
|
|
|
* only be written to the media on commit, this function moves the index budget
|
2011-03-29 22:04:05 +07:00
|
|
|
|
* from @c->bi.idx_growth to @c->bi.uncommitted_idx. The latter will be zeroed
|
|
|
|
|
* by the commit operation.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
*/
|
|
|
|
|
void ubifs_release_budget(struct ubifs_info *c, struct ubifs_budget_req *req)
|
|
|
|
|
{
|
2008-07-24 18:42:05 +07:00
|
|
|
|
ubifs_assert(req->new_page <= 1);
|
|
|
|
|
ubifs_assert(req->dirtied_page <= 1);
|
|
|
|
|
ubifs_assert(req->new_dent <= 1);
|
|
|
|
|
ubifs_assert(req->mod_dent <= 1);
|
|
|
|
|
ubifs_assert(req->new_ino <= 1);
|
|
|
|
|
ubifs_assert(req->new_ino_d <= UBIFS_MAX_INO_DATA);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
ubifs_assert(req->dirtied_ino <= 4);
|
|
|
|
|
ubifs_assert(req->dirtied_ino_d <= UBIFS_MAX_INO_DATA * 4);
|
2008-07-24 18:52:45 +07:00
|
|
|
|
ubifs_assert(!(req->new_ino_d & 7));
|
|
|
|
|
ubifs_assert(!(req->dirtied_ino_d & 7));
|
2008-07-14 23:08:37 +07:00
|
|
|
|
if (!req->recalculate) {
|
|
|
|
|
ubifs_assert(req->idx_growth >= 0);
|
|
|
|
|
ubifs_assert(req->data_growth >= 0);
|
|
|
|
|
ubifs_assert(req->dd_growth >= 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (req->recalculate) {
|
|
|
|
|
req->data_growth = calc_data_growth(c, req);
|
|
|
|
|
req->dd_growth = calc_dd_growth(c, req);
|
|
|
|
|
req->idx_growth = calc_idx_growth(c, req);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!req->data_growth && !req->dd_growth)
|
|
|
|
|
return;
|
|
|
|
|
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.nospace = c->bi.nospace_rp = 0;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
smp_wmb();
|
|
|
|
|
|
|
|
|
|
spin_lock(&c->space_lock);
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.idx_growth -= req->idx_growth;
|
|
|
|
|
c->bi.uncommitted_idx += req->idx_growth;
|
|
|
|
|
c->bi.data_growth -= req->data_growth;
|
|
|
|
|
c->bi.dd_growth -= req->dd_growth;
|
|
|
|
|
c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
|
|
|
|
|
|
|
|
|
|
ubifs_assert(c->bi.idx_growth >= 0);
|
|
|
|
|
ubifs_assert(c->bi.data_growth >= 0);
|
|
|
|
|
ubifs_assert(c->bi.dd_growth >= 0);
|
|
|
|
|
ubifs_assert(c->bi.min_idx_lebs < c->main_lebs);
|
|
|
|
|
ubifs_assert(!(c->bi.idx_growth & 7));
|
|
|
|
|
ubifs_assert(!(c->bi.data_growth & 7));
|
|
|
|
|
ubifs_assert(!(c->bi.dd_growth & 7));
|
2008-07-14 23:08:37 +07:00
|
|
|
|
spin_unlock(&c->space_lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_convert_page_budget - convert budget of a new page.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This function converts budget which was allocated for a new page of data to
|
2008-10-17 00:02:37 +07:00
|
|
|
|
* the budget of changing an existing page of data. The latter is smaller than
|
2008-07-14 23:08:37 +07:00
|
|
|
|
* the former, so this function only does simple re-calculation and does not
|
|
|
|
|
* involve any write-back.
|
|
|
|
|
*/
|
|
|
|
|
void ubifs_convert_page_budget(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
spin_lock(&c->space_lock);
|
|
|
|
|
/* Release the index growth reservation */
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.idx_growth -= c->max_idx_node_sz << UBIFS_BLOCKS_PER_PAGE_SHIFT;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
/* Release the data growth reservation */
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.data_growth -= c->bi.page_budget;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
/* Increase the dirty data growth reservation instead */
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.dd_growth += c->bi.page_budget;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
/* And re-calculate the indexing space reservation */
|
2011-03-29 22:04:05 +07:00
|
|
|
|
c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
spin_unlock(&c->space_lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_release_dirty_inode_budget - release dirty inode budget.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @ui: UBIFS inode to release the budget for
|
|
|
|
|
*
|
|
|
|
|
* This function releases budget corresponding to a dirty inode. It is usually
|
|
|
|
|
* called when after the inode has been written to the media and marked as
|
2009-04-08 19:07:57 +07:00
|
|
|
|
* clean. It also causes the "no space" flags to be cleared.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
*/
|
|
|
|
|
void ubifs_release_dirty_inode_budget(struct ubifs_info *c,
|
|
|
|
|
struct ubifs_inode *ui)
|
|
|
|
|
{
|
2008-07-18 22:54:29 +07:00
|
|
|
|
struct ubifs_budget_req req;
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
2008-07-18 22:54:29 +07:00
|
|
|
|
memset(&req, 0, sizeof(struct ubifs_budget_req));
|
2009-04-08 19:07:57 +07:00
|
|
|
|
/* The "no space" flags will be cleared because dd_growth is > 0 */
|
2011-03-29 22:04:05 +07:00
|
|
|
|
req.dd_growth = c->bi.inode_budget + ALIGN(ui->data_len, 8);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
ubifs_release_budget(c, &req);
|
|
|
|
|
}
|
|
|
|
|
|
UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
|
|
|
|
/**
|
|
|
|
|
* ubifs_reported_space - calculate reported free space.
|
|
|
|
|
* @c: the UBIFS file-system description object
|
|
|
|
|
* @free: amount of free space
|
|
|
|
|
*
|
|
|
|
|
* This function calculates amount of free space which will be reported to
|
|
|
|
|
* user-space. User-space application tend to expect that if the file-system
|
|
|
|
|
* (e.g., via the 'statfs()' call) reports that it has N bytes available, they
|
|
|
|
|
* are able to write a file of size N. UBIFS attaches node headers to each data
|
2008-12-30 22:44:02 +07:00
|
|
|
|
* node and it has to write indexing nodes as well. This introduces additional
|
|
|
|
|
* overhead, and UBIFS has to report slightly less free space to meet the above
|
|
|
|
|
* expectations.
|
UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
|
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*
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* This function assumes free space is made up of uncompressed data nodes and
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* full index nodes (one per data node, tripled because we always allow enough
|
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* space to write the index thrice).
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*
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* Note, the calculation is pessimistic, which means that most of the time
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* UBIFS reports less space than it actually has.
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*/
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2008-12-18 19:06:51 +07:00
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long long ubifs_reported_space(const struct ubifs_info *c, long long free)
|
UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
|
|
|
|
{
|
2008-09-03 20:17:14 +07:00
|
|
|
|
int divisor, factor, f;
|
UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
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/*
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* Reported space size is @free * X, where X is UBIFS block size
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* divided by UBIFS block size + all overhead one data block
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* introduces. The overhead is the node header + indexing overhead.
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*
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2008-09-03 20:17:14 +07:00
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* Indexing overhead calculations are based on the following formula:
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* I = N/(f - 1) + 1, where I - number of indexing nodes, N - number
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* of data nodes, f - fanout. Because effective UBIFS fanout is twice
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* as less than maximum fanout, we assume that each data node
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UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
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* introduces 3 * @c->max_idx_node_sz / (@c->fanout/2 - 1) bytes.
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2008-12-30 22:44:02 +07:00
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* Note, the multiplier 3 is because UBIFS reserves thrice as more space
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UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
|
|
|
|
* for the index.
|
|
|
|
|
*/
|
2008-09-03 20:17:14 +07:00
|
|
|
|
f = c->fanout > 3 ? c->fanout >> 1 : 2;
|
UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
|
|
|
|
factor = UBIFS_BLOCK_SIZE;
|
|
|
|
|
divisor = UBIFS_MAX_DATA_NODE_SZ;
|
2008-09-03 20:17:14 +07:00
|
|
|
|
divisor += (c->max_idx_node_sz * 3) / (f - 1);
|
UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
|
|
|
|
free *= factor;
|
2008-12-18 19:06:51 +07:00
|
|
|
|
return div_u64(free, divisor);
|
UBIFS: improve statfs reporting
Make free space calculation less pessimistic and more realistic,
which in turn improves 'statfs()' reports. Now it lies by 10%-20%,
instead of 20%-30% (10% more honest).
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 78274560 bytes 74.6 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 18214912 bytes 17.4 MiB, wrote 23.3% more than predicted
freespace: was free: 76754944 bytes 73.2 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 19738624 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: was free: 76759040 bytes 73.2 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 19730432 bytes 18.8 MiB, wrote 25.7% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 6977722 bytes 6.7 MiB each time
freespace: was free: 72273920 bytes 68.9 MiB, wrote: 88891392 bytes 84.8 MiB, delta: 16617472 bytes 15.8 MiB, wrote 23.0% more than predicted
freespace: was free: 66154496 bytes 63.1 MiB, wrote: 81506304 bytes 77.7 MiB, delta: 15351808 bytes 14.6 MiB, wrote 23.2% more than predicted
freespace: was free: 58732544 bytes 56.0 MiB, wrote: 72572928 bytes 69.2 MiB, delta: 13840384 bytes 13.2 MiB, wrote 23.6% more than predicted
freespace: was free: 51552256 bytes 49.2 MiB, wrote: 63754240 bytes 60.8 MiB, delta: 12201984 bytes 11.6 MiB, wrote 23.7% more than predicted
freespace: was free: 44404736 bytes 42.3 MiB, wrote: 54943744 bytes 52.4 MiB, delta: 10539008 bytes 10.1 MiB, wrote 23.7% more than predicted
freespace: was free: 37285888 bytes 35.6 MiB, wrote: 46161920 bytes 44.0 MiB, delta: 8876032 bytes 8.5 MiB, wrote 23.8% more than predicted
freespace: was free: 30171136 bytes 28.8 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 7213056 bytes 6.9 MiB, wrote 23.9% more than predicted
freespace: was free: 23048192 bytes 22.0 MiB, wrote: 28606464 bytes 27.3 MiB, delta: 5558272 bytes 5.3 MiB, wrote 24.1% more than predicted
freespace: was free: 15941632 bytes 15.2 MiB, wrote: 19828736 bytes 18.9 MiB, delta: 3887104 bytes 3.7 MiB, wrote 24.4% more than predicted
freespace: was free: 8830976 bytes 8.4 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 2232320 bytes 2.1 MiB, wrote 25.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 6985541 bytes 6.7 MiB each time
freespace: trashing: was free: 76840960 bytes 73.3 MiB, need free: 6985550 bytes 6.7 MiB, files created: 248311, delete 225737 (90.9% of them)
freespace: was free: 65228800 bytes 62.2 MiB, wrote: 82530304 bytes 78.7 MiB, delta: 17301504 bytes 16.5 MiB, wrote 26.5% more than predicted
freespace: trashing: was free: 74485760 bytes 71.0 MiB, need free: 13971091 bytes 13.3 MiB, files created: 248712, delete 202061 (81.2% of them)
freespace: was free: 55025664 bytes 52.5 MiB, wrote: 71925760 bytes 68.6 MiB, delta: 16900096 bytes 16.1 MiB, wrote 30.7% more than predicted
freespace: trashing: was free: 75550720 bytes 72.1 MiB, need free: 20956632 bytes 20.0 MiB, files created: 248849, delete 179822 (72.3% of them)
freespace: was free: 46669824 bytes 44.5 MiB, wrote: 63197184 bytes 60.3 MiB, delta: 16527360 bytes 15.8 MiB, wrote 35.4% more than predicted
freespace: trashing: was free: 76214272 bytes 72.7 MiB, need free: 27942173 bytes 26.6 MiB, files created: 248789, delete 157576 (63.3% of them)
freespace: was free: 39129088 bytes 37.3 MiB, wrote: 55164928 bytes 52.6 MiB, delta: 16035840 bytes 15.3 MiB, wrote 41.0% more than predicted
freespace: trashing: was free: 77398016 bytes 73.8 MiB, need free: 34927714 bytes 33.3 MiB, files created: 248711, delete 136474 (54.9% of them)
freespace: was free: 32325632 bytes 30.8 MiB, wrote: 48234496 bytes 46.0 MiB, delta: 15908864 bytes 15.2 MiB, wrote 49.2% more than predicted
freespace: trashing: was free: 75796480 bytes 72.3 MiB, need free: 41913255 bytes 40.0 MiB, files created: 248674, delete 111164 (44.7% of them)
freespace: was free: 25079808 bytes 23.9 MiB, wrote: 40775680 bytes 38.9 MiB, delta: 15695872 bytes 15.0 MiB, wrote 62.6% more than predicted
freespace: trashing: was free: 78209024 bytes 74.6 MiB, need free: 48898796 bytes 46.6 MiB, files created: 248708, delete 93207 (37.5% of them)
freespace: was free: 20582400 bytes 19.6 MiB, wrote: 34844672 bytes 33.2 MiB, delta: 14262272 bytes 13.6 MiB, wrote 69.3% more than predicted
freespace: trashing: was free: 77328384 bytes 73.7 MiB, need free: 55884337 bytes 53.3 MiB, files created: 248644, delete 68951 (27.7% of them)
freespace: was free: 14368768 bytes 13.7 MiB, wrote: 28278784 bytes 27.0 MiB, delta: 13910016 bytes 13.3 MiB, wrote 96.8% more than predicted
freespace: trashing: was free: 77434880 bytes 73.8 MiB, need free: 62869878 bytes 60.0 MiB, files created: 248640, delete 46767 (18.8% of them)
freespace: was free: 8286208 bytes 7.9 MiB, wrote: 21811200 bytes 20.8 MiB, delta: 13524992 bytes 12.9 MiB, wrote 163.2% more than predicted
freespace: trashing: was free: 77856768 bytes 74.2 MiB, need free: 69855419 bytes 66.6 MiB, files created: 248576, delete 25546 (10.3% of them)
freespace: was free: 5570560 bytes 5.3 MiB, wrote: 8187904 bytes 7.8 MiB, delta: 2617344 bytes 2.5 MiB, wrote 47.0% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 20:15:56 +07:00
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 23:08:37 +07:00
|
|
|
|
/**
|
2009-01-23 19:54:59 +07:00
|
|
|
|
* ubifs_get_free_space_nolock - return amount of free space.
|
2008-07-14 23:08:37 +07:00
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
UBIFS: improve statfs reporting even more
Since free space we report in statfs is file size which should
fit to the FS - change the way we calculate free space and use
leb_overhead instead of dark_wm in calculations.
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 94048256 bytes 89.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 2441216 bytes 2.3 MiB, wrote 2.6% more than predicted
freespace: was free: 92246016 bytes 88.0 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 4247552 bytes 4.1 MiB, wrote 4.6% more than predicted
freespace: was free: 92254208 bytes 88.0 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 4235264 bytes 4.0 MiB, wrote 4.6% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 8386001 bytes 8.0 MiB each time
freespace: was free: 86605824 bytes 82.6 MiB, wrote: 88252416 bytes 84.2 MiB, delta: 1646592 bytes 1.6 MiB, wrote 1.9% more than predicted
freespace: was free: 78667776 bytes 75.0 MiB, wrote: 80715776 bytes 77.0 MiB, delta: 2048000 bytes 2.0 MiB, wrote 2.6% more than predicted
freespace: was free: 69615616 bytes 66.4 MiB, wrote: 71630848 bytes 68.3 MiB, delta: 2015232 bytes 1.9 MiB, wrote 2.9% more than predicted
freespace: was free: 61018112 bytes 58.2 MiB, wrote: 62783488 bytes 59.9 MiB, delta: 1765376 bytes 1.7 MiB, wrote 2.9% more than predicted
freespace: was free: 52424704 bytes 50.0 MiB, wrote: 53968896 bytes 51.5 MiB, delta: 1544192 bytes 1.5 MiB, wrote 2.9% more than predicted
freespace: was free: 43880448 bytes 41.8 MiB, wrote: 45199360 bytes 43.1 MiB, delta: 1318912 bytes 1.3 MiB, wrote 3.0% more than predicted
freespace: was free: 35332096 bytes 33.7 MiB, wrote: 36425728 bytes 34.7 MiB, delta: 1093632 bytes 1.0 MiB, wrote 3.1% more than predicted
freespace: was free: 26771456 bytes 25.5 MiB, wrote: 27643904 bytes 26.4 MiB, delta: 872448 bytes 852.0 KiB, wrote 3.3% more than predicted
freespace: was free: 18231296 bytes 17.4 MiB, wrote: 18878464 bytes 18.0 MiB, delta: 647168 bytes 632.0 KiB, wrote 3.5% more than predicted
freespace: was free: 9674752 bytes 9.2 MiB, wrote: 10088448 bytes 9.6 MiB, delta: 413696 bytes 404.0 KiB, wrote 4.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 8397544 bytes 8.0 MiB each time
freespace: trashing: was free: 92372992 bytes 88.1 MiB, need free: 8397552 bytes 8.0 MiB, files created: 248296, delete 225723 (90.9% of them)
freespace: was free: 71909376 bytes 68.6 MiB, wrote: 82472960 bytes 78.7 MiB, delta: 10563584 bytes 10.1 MiB, wrote 14.7% more than predicted
freespace: trashing: was free: 88989696 bytes 84.9 MiB, need free: 16795096 bytes 16.0 MiB, files created: 248794, delete 201838 (81.1% of them)
freespace: was free: 60354560 bytes 57.6 MiB, wrote: 71782400 bytes 68.5 MiB, delta: 11427840 bytes 10.9 MiB, wrote 18.9% more than predicted
freespace: trashing: was free: 90304512 bytes 86.1 MiB, need free: 25192640 bytes 24.0 MiB, files created: 248733, delete 179342 (72.1% of them)
freespace: was free: 51187712 bytes 48.8 MiB, wrote: 62943232 bytes 60.0 MiB, delta: 11755520 bytes 11.2 MiB, wrote 23.0% more than predicted
freespace: trashing: was free: 91209728 bytes 87.0 MiB, need free: 33590184 bytes 32.0 MiB, files created: 248779, delete 157160 (63.2% of them)
freespace: was free: 42704896 bytes 40.7 MiB, wrote: 55050240 bytes 52.5 MiB, delta: 12345344 bytes 11.8 MiB, wrote 28.9% more than predicted
freespace: trashing: was free: 92700672 bytes 88.4 MiB, need free: 41987728 bytes 40.0 MiB, files created: 248848, delete 136135 (54.7% of them)
freespace: was free: 35250176 bytes 33.6 MiB, wrote: 48115712 bytes 45.9 MiB, delta: 12865536 bytes 12.3 MiB, wrote 36.5% more than predicted
freespace: trashing: was free: 93986816 bytes 89.6 MiB, need free: 50385272 bytes 48.1 MiB, files created: 248723, delete 115385 (46.4% of them)
freespace: was free: 29995008 bytes 28.6 MiB, wrote: 41582592 bytes 39.7 MiB, delta: 11587584 bytes 11.1 MiB, wrote 38.6% more than predicted
freespace: trashing: was free: 91881472 bytes 87.6 MiB, need free: 58782816 bytes 56.1 MiB, files created: 248645, delete 89569 (36.0% of them)
freespace: was free: 22511616 bytes 21.5 MiB, wrote: 34705408 bytes 33.1 MiB, delta: 12193792 bytes 11.6 MiB, wrote 54.2% more than predicted
freespace: trashing: was free: 91774976 bytes 87.5 MiB, need free: 67180360 bytes 64.1 MiB, files created: 248580, delete 66616 (26.8% of them)
freespace: was free: 16908288 bytes 16.1 MiB, wrote: 26898432 bytes 25.7 MiB, delta: 9990144 bytes 9.5 MiB, wrote 59.1% more than predicted
freespace: trashing: was free: 92450816 bytes 88.2 MiB, need free: 75577904 bytes 72.1 MiB, files created: 248654, delete 45381 (18.3% of them)
freespace: was free: 10170368 bytes 9.7 MiB, wrote: 19111936 bytes 18.2 MiB, delta: 8941568 bytes 8.5 MiB, wrote 87.9% more than predicted
freespace: trashing: was free: 93282304 bytes 89.0 MiB, need free: 83975448 bytes 80.1 MiB, files created: 248513, delete 24794 (10.0% of them)
freespace: was free: 3911680 bytes 3.7 MiB, wrote: 7872512 bytes 7.5 MiB, delta: 3960832 bytes 3.8 MiB, wrote 101.3% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 22:58:19 +07:00
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* This function calculates amount of free space to report to user-space.
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*
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* Because UBIFS may introduce substantial overhead (the index, node headers,
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2009-03-16 14:56:57 +07:00
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* alignment, wastage at the end of LEBs, etc), it cannot report real amount of
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* free flash space it has (well, because not all dirty space is reclaimable,
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* UBIFS does not actually know the real amount). If UBIFS did so, it would
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* bread user expectations about what free space is. Users seem to accustomed
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* to assume that if the file-system reports N bytes of free space, they would
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* be able to fit a file of N bytes to the FS. This almost works for
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UBIFS: improve statfs reporting even more
Since free space we report in statfs is file size which should
fit to the FS - change the way we calculate free space and use
leb_overhead instead of dark_wm in calculations.
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 94048256 bytes 89.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 2441216 bytes 2.3 MiB, wrote 2.6% more than predicted
freespace: was free: 92246016 bytes 88.0 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 4247552 bytes 4.1 MiB, wrote 4.6% more than predicted
freespace: was free: 92254208 bytes 88.0 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 4235264 bytes 4.0 MiB, wrote 4.6% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 8386001 bytes 8.0 MiB each time
freespace: was free: 86605824 bytes 82.6 MiB, wrote: 88252416 bytes 84.2 MiB, delta: 1646592 bytes 1.6 MiB, wrote 1.9% more than predicted
freespace: was free: 78667776 bytes 75.0 MiB, wrote: 80715776 bytes 77.0 MiB, delta: 2048000 bytes 2.0 MiB, wrote 2.6% more than predicted
freespace: was free: 69615616 bytes 66.4 MiB, wrote: 71630848 bytes 68.3 MiB, delta: 2015232 bytes 1.9 MiB, wrote 2.9% more than predicted
freespace: was free: 61018112 bytes 58.2 MiB, wrote: 62783488 bytes 59.9 MiB, delta: 1765376 bytes 1.7 MiB, wrote 2.9% more than predicted
freespace: was free: 52424704 bytes 50.0 MiB, wrote: 53968896 bytes 51.5 MiB, delta: 1544192 bytes 1.5 MiB, wrote 2.9% more than predicted
freespace: was free: 43880448 bytes 41.8 MiB, wrote: 45199360 bytes 43.1 MiB, delta: 1318912 bytes 1.3 MiB, wrote 3.0% more than predicted
freespace: was free: 35332096 bytes 33.7 MiB, wrote: 36425728 bytes 34.7 MiB, delta: 1093632 bytes 1.0 MiB, wrote 3.1% more than predicted
freespace: was free: 26771456 bytes 25.5 MiB, wrote: 27643904 bytes 26.4 MiB, delta: 872448 bytes 852.0 KiB, wrote 3.3% more than predicted
freespace: was free: 18231296 bytes 17.4 MiB, wrote: 18878464 bytes 18.0 MiB, delta: 647168 bytes 632.0 KiB, wrote 3.5% more than predicted
freespace: was free: 9674752 bytes 9.2 MiB, wrote: 10088448 bytes 9.6 MiB, delta: 413696 bytes 404.0 KiB, wrote 4.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 8397544 bytes 8.0 MiB each time
freespace: trashing: was free: 92372992 bytes 88.1 MiB, need free: 8397552 bytes 8.0 MiB, files created: 248296, delete 225723 (90.9% of them)
freespace: was free: 71909376 bytes 68.6 MiB, wrote: 82472960 bytes 78.7 MiB, delta: 10563584 bytes 10.1 MiB, wrote 14.7% more than predicted
freespace: trashing: was free: 88989696 bytes 84.9 MiB, need free: 16795096 bytes 16.0 MiB, files created: 248794, delete 201838 (81.1% of them)
freespace: was free: 60354560 bytes 57.6 MiB, wrote: 71782400 bytes 68.5 MiB, delta: 11427840 bytes 10.9 MiB, wrote 18.9% more than predicted
freespace: trashing: was free: 90304512 bytes 86.1 MiB, need free: 25192640 bytes 24.0 MiB, files created: 248733, delete 179342 (72.1% of them)
freespace: was free: 51187712 bytes 48.8 MiB, wrote: 62943232 bytes 60.0 MiB, delta: 11755520 bytes 11.2 MiB, wrote 23.0% more than predicted
freespace: trashing: was free: 91209728 bytes 87.0 MiB, need free: 33590184 bytes 32.0 MiB, files created: 248779, delete 157160 (63.2% of them)
freespace: was free: 42704896 bytes 40.7 MiB, wrote: 55050240 bytes 52.5 MiB, delta: 12345344 bytes 11.8 MiB, wrote 28.9% more than predicted
freespace: trashing: was free: 92700672 bytes 88.4 MiB, need free: 41987728 bytes 40.0 MiB, files created: 248848, delete 136135 (54.7% of them)
freespace: was free: 35250176 bytes 33.6 MiB, wrote: 48115712 bytes 45.9 MiB, delta: 12865536 bytes 12.3 MiB, wrote 36.5% more than predicted
freespace: trashing: was free: 93986816 bytes 89.6 MiB, need free: 50385272 bytes 48.1 MiB, files created: 248723, delete 115385 (46.4% of them)
freespace: was free: 29995008 bytes 28.6 MiB, wrote: 41582592 bytes 39.7 MiB, delta: 11587584 bytes 11.1 MiB, wrote 38.6% more than predicted
freespace: trashing: was free: 91881472 bytes 87.6 MiB, need free: 58782816 bytes 56.1 MiB, files created: 248645, delete 89569 (36.0% of them)
freespace: was free: 22511616 bytes 21.5 MiB, wrote: 34705408 bytes 33.1 MiB, delta: 12193792 bytes 11.6 MiB, wrote 54.2% more than predicted
freespace: trashing: was free: 91774976 bytes 87.5 MiB, need free: 67180360 bytes 64.1 MiB, files created: 248580, delete 66616 (26.8% of them)
freespace: was free: 16908288 bytes 16.1 MiB, wrote: 26898432 bytes 25.7 MiB, delta: 9990144 bytes 9.5 MiB, wrote 59.1% more than predicted
freespace: trashing: was free: 92450816 bytes 88.2 MiB, need free: 75577904 bytes 72.1 MiB, files created: 248654, delete 45381 (18.3% of them)
freespace: was free: 10170368 bytes 9.7 MiB, wrote: 19111936 bytes 18.2 MiB, delta: 8941568 bytes 8.5 MiB, wrote 87.9% more than predicted
freespace: trashing: was free: 93282304 bytes 89.0 MiB, need free: 83975448 bytes 80.1 MiB, files created: 248513, delete 24794 (10.0% of them)
freespace: was free: 3911680 bytes 3.7 MiB, wrote: 7872512 bytes 7.5 MiB, delta: 3960832 bytes 3.8 MiB, wrote 101.3% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 22:58:19 +07:00
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* traditional file-systems, because they have way less overhead than UBIFS.
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* So, to keep users happy, UBIFS tries to take the overhead into account.
|
2008-07-14 23:08:37 +07:00
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*/
|
2009-01-23 19:54:59 +07:00
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long long ubifs_get_free_space_nolock(struct ubifs_info *c)
|
2008-07-14 23:08:37 +07:00
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{
|
2009-01-23 19:54:59 +07:00
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int rsvd_idx_lebs, lebs;
|
2008-07-14 23:08:37 +07:00
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long long available, outstanding, free;
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2011-03-29 22:04:05 +07:00
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ubifs_assert(c->bi.min_idx_lebs == ubifs_calc_min_idx_lebs(c));
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outstanding = c->bi.data_growth + c->bi.dd_growth;
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available = ubifs_calc_available(c, c->bi.min_idx_lebs);
|
UBIFS: improve statfs reporting even more
Since free space we report in statfs is file size which should
fit to the FS - change the way we calculate free space and use
leb_overhead instead of dark_wm in calculations.
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 94048256 bytes 89.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 2441216 bytes 2.3 MiB, wrote 2.6% more than predicted
freespace: was free: 92246016 bytes 88.0 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 4247552 bytes 4.1 MiB, wrote 4.6% more than predicted
freespace: was free: 92254208 bytes 88.0 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 4235264 bytes 4.0 MiB, wrote 4.6% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 8386001 bytes 8.0 MiB each time
freespace: was free: 86605824 bytes 82.6 MiB, wrote: 88252416 bytes 84.2 MiB, delta: 1646592 bytes 1.6 MiB, wrote 1.9% more than predicted
freespace: was free: 78667776 bytes 75.0 MiB, wrote: 80715776 bytes 77.0 MiB, delta: 2048000 bytes 2.0 MiB, wrote 2.6% more than predicted
freespace: was free: 69615616 bytes 66.4 MiB, wrote: 71630848 bytes 68.3 MiB, delta: 2015232 bytes 1.9 MiB, wrote 2.9% more than predicted
freespace: was free: 61018112 bytes 58.2 MiB, wrote: 62783488 bytes 59.9 MiB, delta: 1765376 bytes 1.7 MiB, wrote 2.9% more than predicted
freespace: was free: 52424704 bytes 50.0 MiB, wrote: 53968896 bytes 51.5 MiB, delta: 1544192 bytes 1.5 MiB, wrote 2.9% more than predicted
freespace: was free: 43880448 bytes 41.8 MiB, wrote: 45199360 bytes 43.1 MiB, delta: 1318912 bytes 1.3 MiB, wrote 3.0% more than predicted
freespace: was free: 35332096 bytes 33.7 MiB, wrote: 36425728 bytes 34.7 MiB, delta: 1093632 bytes 1.0 MiB, wrote 3.1% more than predicted
freespace: was free: 26771456 bytes 25.5 MiB, wrote: 27643904 bytes 26.4 MiB, delta: 872448 bytes 852.0 KiB, wrote 3.3% more than predicted
freespace: was free: 18231296 bytes 17.4 MiB, wrote: 18878464 bytes 18.0 MiB, delta: 647168 bytes 632.0 KiB, wrote 3.5% more than predicted
freespace: was free: 9674752 bytes 9.2 MiB, wrote: 10088448 bytes 9.6 MiB, delta: 413696 bytes 404.0 KiB, wrote 4.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 8397544 bytes 8.0 MiB each time
freespace: trashing: was free: 92372992 bytes 88.1 MiB, need free: 8397552 bytes 8.0 MiB, files created: 248296, delete 225723 (90.9% of them)
freespace: was free: 71909376 bytes 68.6 MiB, wrote: 82472960 bytes 78.7 MiB, delta: 10563584 bytes 10.1 MiB, wrote 14.7% more than predicted
freespace: trashing: was free: 88989696 bytes 84.9 MiB, need free: 16795096 bytes 16.0 MiB, files created: 248794, delete 201838 (81.1% of them)
freespace: was free: 60354560 bytes 57.6 MiB, wrote: 71782400 bytes 68.5 MiB, delta: 11427840 bytes 10.9 MiB, wrote 18.9% more than predicted
freespace: trashing: was free: 90304512 bytes 86.1 MiB, need free: 25192640 bytes 24.0 MiB, files created: 248733, delete 179342 (72.1% of them)
freespace: was free: 51187712 bytes 48.8 MiB, wrote: 62943232 bytes 60.0 MiB, delta: 11755520 bytes 11.2 MiB, wrote 23.0% more than predicted
freespace: trashing: was free: 91209728 bytes 87.0 MiB, need free: 33590184 bytes 32.0 MiB, files created: 248779, delete 157160 (63.2% of them)
freespace: was free: 42704896 bytes 40.7 MiB, wrote: 55050240 bytes 52.5 MiB, delta: 12345344 bytes 11.8 MiB, wrote 28.9% more than predicted
freespace: trashing: was free: 92700672 bytes 88.4 MiB, need free: 41987728 bytes 40.0 MiB, files created: 248848, delete 136135 (54.7% of them)
freespace: was free: 35250176 bytes 33.6 MiB, wrote: 48115712 bytes 45.9 MiB, delta: 12865536 bytes 12.3 MiB, wrote 36.5% more than predicted
freespace: trashing: was free: 93986816 bytes 89.6 MiB, need free: 50385272 bytes 48.1 MiB, files created: 248723, delete 115385 (46.4% of them)
freespace: was free: 29995008 bytes 28.6 MiB, wrote: 41582592 bytes 39.7 MiB, delta: 11587584 bytes 11.1 MiB, wrote 38.6% more than predicted
freespace: trashing: was free: 91881472 bytes 87.6 MiB, need free: 58782816 bytes 56.1 MiB, files created: 248645, delete 89569 (36.0% of them)
freespace: was free: 22511616 bytes 21.5 MiB, wrote: 34705408 bytes 33.1 MiB, delta: 12193792 bytes 11.6 MiB, wrote 54.2% more than predicted
freespace: trashing: was free: 91774976 bytes 87.5 MiB, need free: 67180360 bytes 64.1 MiB, files created: 248580, delete 66616 (26.8% of them)
freespace: was free: 16908288 bytes 16.1 MiB, wrote: 26898432 bytes 25.7 MiB, delta: 9990144 bytes 9.5 MiB, wrote 59.1% more than predicted
freespace: trashing: was free: 92450816 bytes 88.2 MiB, need free: 75577904 bytes 72.1 MiB, files created: 248654, delete 45381 (18.3% of them)
freespace: was free: 10170368 bytes 9.7 MiB, wrote: 19111936 bytes 18.2 MiB, delta: 8941568 bytes 8.5 MiB, wrote 87.9% more than predicted
freespace: trashing: was free: 93282304 bytes 89.0 MiB, need free: 83975448 bytes 80.1 MiB, files created: 248513, delete 24794 (10.0% of them)
freespace: was free: 3911680 bytes 3.7 MiB, wrote: 7872512 bytes 7.5 MiB, delta: 3960832 bytes 3.8 MiB, wrote 101.3% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 22:58:19 +07:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* When reporting free space to user-space, UBIFS guarantees that it is
|
|
|
|
|
* possible to write a file of free space size. This means that for
|
|
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|
|
* empty LEBs we may use more precise calculations than
|
|
|
|
|
* 'ubifs_calc_available()' is using. Namely, we know that in empty
|
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|
* LEBs we would waste only @c->leb_overhead bytes, not @c->dark_wm.
|
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* Thus, amend the available space.
|
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*
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* Note, the calculations below are similar to what we have in
|
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* 'do_budget_space()', so refer there for comments.
|
|
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|
*/
|
2011-03-29 22:04:05 +07:00
|
|
|
|
if (c->bi.min_idx_lebs > c->lst.idx_lebs)
|
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|
rsvd_idx_lebs = c->bi.min_idx_lebs - c->lst.idx_lebs;
|
UBIFS: improve statfs reporting even more
Since free space we report in statfs is file size which should
fit to the FS - change the way we calculate free space and use
leb_overhead instead of dark_wm in calculations.
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 94048256 bytes 89.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 2441216 bytes 2.3 MiB, wrote 2.6% more than predicted
freespace: was free: 92246016 bytes 88.0 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 4247552 bytes 4.1 MiB, wrote 4.6% more than predicted
freespace: was free: 92254208 bytes 88.0 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 4235264 bytes 4.0 MiB, wrote 4.6% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 8386001 bytes 8.0 MiB each time
freespace: was free: 86605824 bytes 82.6 MiB, wrote: 88252416 bytes 84.2 MiB, delta: 1646592 bytes 1.6 MiB, wrote 1.9% more than predicted
freespace: was free: 78667776 bytes 75.0 MiB, wrote: 80715776 bytes 77.0 MiB, delta: 2048000 bytes 2.0 MiB, wrote 2.6% more than predicted
freespace: was free: 69615616 bytes 66.4 MiB, wrote: 71630848 bytes 68.3 MiB, delta: 2015232 bytes 1.9 MiB, wrote 2.9% more than predicted
freespace: was free: 61018112 bytes 58.2 MiB, wrote: 62783488 bytes 59.9 MiB, delta: 1765376 bytes 1.7 MiB, wrote 2.9% more than predicted
freespace: was free: 52424704 bytes 50.0 MiB, wrote: 53968896 bytes 51.5 MiB, delta: 1544192 bytes 1.5 MiB, wrote 2.9% more than predicted
freespace: was free: 43880448 bytes 41.8 MiB, wrote: 45199360 bytes 43.1 MiB, delta: 1318912 bytes 1.3 MiB, wrote 3.0% more than predicted
freespace: was free: 35332096 bytes 33.7 MiB, wrote: 36425728 bytes 34.7 MiB, delta: 1093632 bytes 1.0 MiB, wrote 3.1% more than predicted
freespace: was free: 26771456 bytes 25.5 MiB, wrote: 27643904 bytes 26.4 MiB, delta: 872448 bytes 852.0 KiB, wrote 3.3% more than predicted
freespace: was free: 18231296 bytes 17.4 MiB, wrote: 18878464 bytes 18.0 MiB, delta: 647168 bytes 632.0 KiB, wrote 3.5% more than predicted
freespace: was free: 9674752 bytes 9.2 MiB, wrote: 10088448 bytes 9.6 MiB, delta: 413696 bytes 404.0 KiB, wrote 4.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 8397544 bytes 8.0 MiB each time
freespace: trashing: was free: 92372992 bytes 88.1 MiB, need free: 8397552 bytes 8.0 MiB, files created: 248296, delete 225723 (90.9% of them)
freespace: was free: 71909376 bytes 68.6 MiB, wrote: 82472960 bytes 78.7 MiB, delta: 10563584 bytes 10.1 MiB, wrote 14.7% more than predicted
freespace: trashing: was free: 88989696 bytes 84.9 MiB, need free: 16795096 bytes 16.0 MiB, files created: 248794, delete 201838 (81.1% of them)
freespace: was free: 60354560 bytes 57.6 MiB, wrote: 71782400 bytes 68.5 MiB, delta: 11427840 bytes 10.9 MiB, wrote 18.9% more than predicted
freespace: trashing: was free: 90304512 bytes 86.1 MiB, need free: 25192640 bytes 24.0 MiB, files created: 248733, delete 179342 (72.1% of them)
freespace: was free: 51187712 bytes 48.8 MiB, wrote: 62943232 bytes 60.0 MiB, delta: 11755520 bytes 11.2 MiB, wrote 23.0% more than predicted
freespace: trashing: was free: 91209728 bytes 87.0 MiB, need free: 33590184 bytes 32.0 MiB, files created: 248779, delete 157160 (63.2% of them)
freespace: was free: 42704896 bytes 40.7 MiB, wrote: 55050240 bytes 52.5 MiB, delta: 12345344 bytes 11.8 MiB, wrote 28.9% more than predicted
freespace: trashing: was free: 92700672 bytes 88.4 MiB, need free: 41987728 bytes 40.0 MiB, files created: 248848, delete 136135 (54.7% of them)
freespace: was free: 35250176 bytes 33.6 MiB, wrote: 48115712 bytes 45.9 MiB, delta: 12865536 bytes 12.3 MiB, wrote 36.5% more than predicted
freespace: trashing: was free: 93986816 bytes 89.6 MiB, need free: 50385272 bytes 48.1 MiB, files created: 248723, delete 115385 (46.4% of them)
freespace: was free: 29995008 bytes 28.6 MiB, wrote: 41582592 bytes 39.7 MiB, delta: 11587584 bytes 11.1 MiB, wrote 38.6% more than predicted
freespace: trashing: was free: 91881472 bytes 87.6 MiB, need free: 58782816 bytes 56.1 MiB, files created: 248645, delete 89569 (36.0% of them)
freespace: was free: 22511616 bytes 21.5 MiB, wrote: 34705408 bytes 33.1 MiB, delta: 12193792 bytes 11.6 MiB, wrote 54.2% more than predicted
freespace: trashing: was free: 91774976 bytes 87.5 MiB, need free: 67180360 bytes 64.1 MiB, files created: 248580, delete 66616 (26.8% of them)
freespace: was free: 16908288 bytes 16.1 MiB, wrote: 26898432 bytes 25.7 MiB, delta: 9990144 bytes 9.5 MiB, wrote 59.1% more than predicted
freespace: trashing: was free: 92450816 bytes 88.2 MiB, need free: 75577904 bytes 72.1 MiB, files created: 248654, delete 45381 (18.3% of them)
freespace: was free: 10170368 bytes 9.7 MiB, wrote: 19111936 bytes 18.2 MiB, delta: 8941568 bytes 8.5 MiB, wrote 87.9% more than predicted
freespace: trashing: was free: 93282304 bytes 89.0 MiB, need free: 83975448 bytes 80.1 MiB, files created: 248513, delete 24794 (10.0% of them)
freespace: was free: 3911680 bytes 3.7 MiB, wrote: 7872512 bytes 7.5 MiB, delta: 3960832 bytes 3.8 MiB, wrote 101.3% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 22:58:19 +07:00
|
|
|
|
else
|
|
|
|
|
rsvd_idx_lebs = 0;
|
|
|
|
|
lebs = c->lst.empty_lebs + c->freeable_cnt + c->idx_gc_cnt -
|
|
|
|
|
c->lst.taken_empty_lebs;
|
|
|
|
|
lebs -= rsvd_idx_lebs;
|
|
|
|
|
available += lebs * (c->dark_wm - c->leb_overhead);
|
2008-07-14 23:08:37 +07:00
|
|
|
|
|
|
|
|
|
if (available > outstanding)
|
|
|
|
|
free = ubifs_reported_space(c, available - outstanding);
|
|
|
|
|
else
|
|
|
|
|
free = 0;
|
|
|
|
|
return free;
|
|
|
|
|
}
|
2009-01-23 19:54:59 +07:00
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_get_free_space - return amount of free space.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
2009-09-15 21:09:24 +07:00
|
|
|
|
* This function calculates and returns amount of free space to report to
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2009-01-23 19:54:59 +07:00
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* user-space.
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*/
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long long ubifs_get_free_space(struct ubifs_info *c)
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{
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long long free;
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spin_lock(&c->space_lock);
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free = ubifs_get_free_space_nolock(c);
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spin_unlock(&c->space_lock);
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return free;
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}
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