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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6727ad9e20
When doing an nmi backtrace of many cores, most of which are idle, the output is a little overwhelming and very uninformative. Suppress messages for cpus that are idling when they are interrupted and just emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN". We do this by grouping all the cpuidle code together into a new .cpuidle.text section, and then checking the address of the interrupted PC to see if it lies within that section. This commit suitably tags x86 and tile idle routines, and only adds in the minimal framework for other architectures. Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm] Tested-by: Petr Mladek <pmladek@suse.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
118 lines
2.6 KiB
ArmAsm
118 lines
2.6 KiB
ArmAsm
/*
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* OpenRISC vmlinux.lds.S
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*
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* Linux architectural port borrowing liberally from similar works of
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* others. All original copyrights apply as per the original source
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* declaration.
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*
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* Modifications for the OpenRISC architecture:
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* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
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* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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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 License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* ld script for OpenRISC architecture
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*/
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/* TODO
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* - clean up __offset & stuff
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* - change all 8192 aligment to PAGE !!!
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* - recheck if all aligments are really needed
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*/
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# define LOAD_OFFSET PAGE_OFFSET
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# define LOAD_BASE PAGE_OFFSET
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#include <asm/page.h>
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#include <asm/cache.h>
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#include <asm-generic/vmlinux.lds.h>
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OUTPUT_FORMAT("elf32-or32", "elf32-or32", "elf32-or32")
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jiffies = jiffies_64 + 4;
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SECTIONS
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{
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/* Read-only sections, merged into text segment: */
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. = LOAD_BASE ;
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/* _s_kernel_ro must be page aligned */
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. = ALIGN(PAGE_SIZE);
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_s_kernel_ro = .;
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.text : AT(ADDR(.text) - LOAD_OFFSET)
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{
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_stext = .;
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TEXT_TEXT
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SCHED_TEXT
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CPUIDLE_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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IRQENTRY_TEXT
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SOFTIRQENTRY_TEXT
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*(.fixup)
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*(.text.__*)
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_etext = .;
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}
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/* TODO: Check if fixup and text.__* are really necessary
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* fixup is definitely necessary
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*/
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_sdata = .;
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/* Page alignment required for RO_DATA_SECTION */
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RO_DATA_SECTION(PAGE_SIZE)
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_e_kernel_ro = .;
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/* Whatever comes after _e_kernel_ro had better be page-aligend, too */
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/* 32 here is cacheline size... recheck this */
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RW_DATA_SECTION(32, PAGE_SIZE, PAGE_SIZE)
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_edata = .;
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EXCEPTION_TABLE(4)
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NOTES
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/* Init code and data */
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. = ALIGN(PAGE_SIZE);
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__init_begin = .;
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HEAD_TEXT_SECTION
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/* Page aligned */
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INIT_TEXT_SECTION(PAGE_SIZE)
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/* Align __setup_start on 16 byte boundary */
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INIT_DATA_SECTION(16)
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PERCPU_SECTION(L1_CACHE_BYTES)
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__init_end = .;
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. = ALIGN(PAGE_SIZE);
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.initrd : AT(ADDR(.initrd) - LOAD_OFFSET)
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{
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__initrd_start = .;
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*(.initrd)
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__initrd_end = .;
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FILL (0);
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. = ALIGN (PAGE_SIZE);
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}
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__vmlinux_end = .; /* last address of the physical file */
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BSS_SECTION(0, 0, 0x20)
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_end = .;
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/* Throw in the debugging sections */
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STABS_DEBUG
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DWARF_DEBUG
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/* Sections to be discarded -- must be last */
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DISCARDS
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}
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