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>
74 lines
1.3 KiB
ArmAsm
74 lines
1.3 KiB
ArmAsm
/* ld script to make Meta Linux kernel */
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#include <asm/thread_info.h>
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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-metag", "elf32-metag", "elf32-metag")
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OUTPUT_ARCH(metag)
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ENTRY(__start)
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_jiffies = _jiffies_64;
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SECTIONS
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{
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. = CONFIG_PAGE_OFFSET;
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_text = .;
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__text = .;
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__stext = .;
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HEAD_TEXT_SECTION
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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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IRQENTRY_TEXT
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SOFTIRQENTRY_TEXT
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*(.text.*)
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*(.gnu.warning)
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}
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__etext = .; /* End of text section */
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__sdata = .;
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RO_DATA_SECTION(PAGE_SIZE)
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RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
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__edata = .; /* End of data section */
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EXCEPTION_TABLE(16)
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NOTES
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. = ALIGN(PAGE_SIZE); /* Init code and data */
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___init_begin = .;
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INIT_TEXT_SECTION(PAGE_SIZE)
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INIT_DATA_SECTION(16)
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.init.arch.info : {
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___arch_info_begin = .;
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*(.arch.info.init)
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___arch_info_end = .;
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}
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PERCPU_SECTION(L1_CACHE_BYTES)
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___init_end = .;
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BSS_SECTION(0, PAGE_SIZE, 0)
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__end = .;
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. = ALIGN(PAGE_SIZE);
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__heap_start = .;
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DWARF_DEBUG
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/* When something in the kernel is NOT compiled as a module, the
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* module cleanup code and data are put into these segments. Both
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* can then be thrown away, as cleanup code is never called unless
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* it's a module.
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*/
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DISCARDS
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}
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