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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>
84 lines
1.8 KiB
ArmAsm
84 lines
1.8 KiB
ArmAsm
/*
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* Linker script for Hexagon kernel
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*
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* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 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
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* GNU 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 License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/asm-offsets.h> /* Most of the kernel defines are here */
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#include <asm/mem-layout.h> /* except for page_offset */
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#include <asm/cache.h> /* and now we're pulling cache line size */
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OUTPUT_ARCH(hexagon)
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ENTRY(stext)
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jiffies = jiffies_64;
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/*
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See asm-generic/vmlinux.lds.h for expansion of some of these macros.
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See asm-generic/sections.h for seemingly required labels.
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*/
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#define PAGE_SIZE _PAGE_SIZE
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SECTIONS
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{
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. = PAGE_OFFSET;
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__init_begin = .;
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HEAD_TEXT_SECTION
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INIT_TEXT_SECTION(PAGE_SIZE)
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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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_stext = .;
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.text : AT(ADDR(.text)) {
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_text = .;
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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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*(.fixup)
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}
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_etext = .;
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INIT_DATA_SECTION(PAGE_SIZE)
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_sdata = .;
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RW_DATA_SECTION(32,PAGE_SIZE,_THREAD_SIZE)
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RO_DATA_SECTION(PAGE_SIZE)
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_edata = .;
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EXCEPTION_TABLE(16)
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NOTES
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BSS_SECTION(_PAGE_SIZE, _PAGE_SIZE, _PAGE_SIZE)
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_end = .;
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/DISCARD/ : {
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EXIT_TEXT
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EXIT_DATA
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EXIT_CALL
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}
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STABS_DEBUG
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DWARF_DEBUG
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}
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