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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>
78 lines
1.4 KiB
ArmAsm
78 lines
1.4 KiB
ArmAsm
#include <asm-generic/vmlinux.lds.h>
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#include <asm/thread_info.h>
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#include <asm/cache.h>
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#include <asm/page.h>
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#include <asm/setup.h>
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OUTPUT_FORMAT("elf64-alpha")
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OUTPUT_ARCH(alpha)
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ENTRY(__start)
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PHDRS { kernel PT_LOAD; note PT_NOTE; }
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jiffies = jiffies_64;
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SECTIONS
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{
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#ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
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. = 0xfffffc0000310000;
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#else
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. = 0xfffffc0001010000;
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#endif
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_text = .; /* Text and read-only data */
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.text : {
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HEAD_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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*(.fixup)
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*(.gnu.warning)
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} :kernel
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swapper_pg_dir = SWAPPER_PGD;
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_etext = .; /* End of text section */
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NOTES :kernel :note
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.dummy : {
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*(.dummy)
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} :kernel
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RODATA
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EXCEPTION_TABLE(16)
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/* Will be freed after init */
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__init_begin = ALIGN(PAGE_SIZE);
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INIT_TEXT_SECTION(PAGE_SIZE)
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INIT_DATA_SECTION(16)
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PERCPU_SECTION(L1_CACHE_BYTES)
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/* Align to THREAD_SIZE rather than PAGE_SIZE here so any padding page
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needed for the THREAD_SIZE aligned init_task gets freed after init */
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. = ALIGN(THREAD_SIZE);
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__init_end = .;
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/* Freed after init ends here */
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_sdata = .; /* Start of rw data section */
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_data = .;
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RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
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.got : {
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*(.got)
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}
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.sdata : {
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*(.sdata)
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}
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_edata = .; /* End of data section */
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BSS_SECTION(0, 0, 0)
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_end = .;
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.mdebug 0 : {
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*(.mdebug)
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}
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.note 0 : {
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*(.note)
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}
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STABS_DEBUG
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DWARF_DEBUG
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DISCARDS
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}
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