Chris Metcalf 6727ad9e20 nmi_backtrace: generate one-line reports for idle cpus ...

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>

2016-10-07 18:46:30 -07:00

..

asm-offsets.c

Hexagon: update copyright dates

2013-04-30 19:40:27 -05:00

dma.c

dma-mapping: use unsigned long for dma_attrs

2016-08-04 08:50:07 -04:00

head.S

Hexagon: update copyright dates

2013-04-30 19:40:27 -05:00

hexagon_ksyms.c

arch: hexagon: kernel: hexagon_ksyms.c: export related symbols which various modules need

2014-04-04 18:20:00 -05:00

irq_cpu.c

Hexagon: Copyright marking changes

2012-10-18 17:07:21 -05:00

kgdb.c

hexagon: Fix misspellings in comments.

2016-04-18 12:45:54 +02:00

Makefile

Hexagon: add screen_info for VGA_CONSOLE

2014-04-04 18:20:01 -05:00

module.c

Hexagon: Copyright marking changes

2012-10-18 17:07:21 -05:00

process.c

exit_thread: remove empty bodies

2016-05-20 17:58:30 -07:00

ptrace.c

Hexagon: set the e_flags in user regset view for core dumps

2014-04-04 18:20:02 -05:00

reset.c

arch: hexagon: kernel: reset.c: use function pointer instead of function for pm_power_off and export it

2014-04-04 18:20:00 -05:00

screen_info.c

Hexagon: add screen_info for VGA_CONSOLE

2014-04-04 18:20:01 -05:00

setup.c

hexagon: Fix build failures in linux-next

2014-12-16 13:27:12 -06:00

signal.c

all arches, signal: move restart_block to struct task_struct

2015-02-12 18:54:12 -08:00

smp.c

arch/hotplug: Call into idle with a proper state

2016-03-01 20:36:57 +01:00

stacktrace.c

Hexagon: Copyright marking changes

2012-10-18 17:07:21 -05:00

syscalltab.c

Hexagon: Copyright marking changes

2012-10-18 17:07:21 -05:00

time.c

hexagon/time: Migrate to new 'set-state' interface

2015-09-08 18:43:17 -05:00

trampoline.S

Hexagon: Copyright marking changes

2012-10-18 17:07:21 -05:00

traps.c

Hexagon: fix signal delivery for debug traps

2014-12-16 13:27:39 -06:00

vdso.c

vdso: make arch_setup_additional_pages wait for mmap_sem for write killable

2016-05-23 17:04:14 -07:00

vm_entry.S

Hexagon: fix register used to call do_work_pending

2013-05-07 11:37:53 -05:00

vm_events.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel

2013-05-01 07:43:05 -07:00

vm_init_segtable.S

Hexagon: Copyright marking changes

2012-10-18 17:07:21 -05:00

vm_ops.S

hexagon: Fix misspellings in comments.

2016-04-18 12:45:54 +02:00

vm_switch.S

Hexagon: Copyright marking changes

2012-10-18 17:07:21 -05:00

vm_vectors.S

Hexagon: update copyright dates

2013-04-30 19:40:27 -05:00

vmlinux.lds.S

nmi_backtrace: generate one-line reports for idle cpus

2016-10-07 18:46:30 -07:00