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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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257c62e1bc
rpm has a habit of running fdatasync when the file hasn't changed. We already detect if a file hasn't been changed in the current transaction but it might have been sent to the tree-log in this transaction and not changed since the last call to fsync. In this case, we want to avoid a tree log sync, which includes a number of synchronous writes and barriers. This commit extends the existing tracking of the last transaction to change a file to also track the last sub-transaction. The end result is that rpm -ivh and -Uvh are roughly twice as fast, and on par with ext3. Signed-off-by: Chris Mason <chris.mason@oracle.com>
52 lines
2.1 KiB
C
52 lines
2.1 KiB
C
/*
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* Copyright (C) 2008 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __TREE_LOG_
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#define __TREE_LOG_
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/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
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#define BTRFS_NO_LOG_SYNC 256
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int btrfs_sync_log(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
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int btrfs_recover_log_trees(struct btrfs_root *tree_root);
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int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct dentry *dentry);
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int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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const char *name, int name_len,
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struct inode *dir, u64 index);
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int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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const char *name, int name_len,
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struct inode *inode, u64 dirid);
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int btrfs_join_running_log_trans(struct btrfs_root *root);
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int btrfs_end_log_trans(struct btrfs_root *root);
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int btrfs_pin_log_trans(struct btrfs_root *root);
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int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct inode *inode,
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struct dentry *parent, int exists_only);
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void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
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struct inode *dir, struct inode *inode,
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int for_rename);
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int btrfs_log_new_name(struct btrfs_trans_handle *trans,
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struct inode *inode, struct inode *old_dir,
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struct dentry *parent);
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#endif
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