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

..

governors

cpuidle: menu: Fall back to polling if next timer event is near

2016-03-21 15:50:28 +01:00

coupled.c

cpuidle/coupled: Convert to hotplug state machine

2016-09-06 18:30:24 +02:00

cpuidle-arm.c

Merge branches 'pm-cpuidle', 'pm-opp' and 'pm-avs'

2016-10-02 01:43:16 +02:00

cpuidle-at91.c

drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver

2015-06-16 14:12:38 -04:00

cpuidle-big_little.c

ARM: MCPM: remove residency argument from mcpm_cpu_suspend()

2015-05-06 11:47:10 -04:00

cpuidle-calxeda.c

ARM: migrate to common PSCI client code

2015-08-03 15:38:39 +01:00

cpuidle-clps711x.c

drivers/cpuidle: make cpuidle-clps711x.c explicitly non-modular

2015-12-15 00:22:21 +01:00

cpuidle-cps.c

cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic

2014-11-12 21:17:27 +01:00

cpuidle-exynos.c

drivers/cpuidle: make cpuidle-exynos.c explicitly non-modular

2015-12-15 00:22:22 +01:00

cpuidle-kirkwood.c

ARM: cpuidle: Remove duplicate header inclusion

2015-03-23 18:03:11 +01:00

cpuidle-mvebu-v7.c

cpuidle: mvebu: disable the bind/unbind attributes and use builtin_platform_driver

2015-10-23 12:40:48 +02:00

cpuidle-powernv.c

cpuidle/powernv: Convert to hotplug state machine

2016-09-06 18:30:24 +02:00

cpuidle-pseries.c

cpuidle/pseries: Convert to hotplug state machine

2016-09-06 18:30:24 +02:00

cpuidle-ux500.c

drivers/cpuidle: make cpuidle-ux500.c explicitly non-modular

2015-12-15 00:22:22 +01:00

cpuidle-zynq.c

drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver

2015-06-16 14:12:38 -04:00

cpuidle.c

cpuidle: Fix last_residency division

2016-07-04 14:17:34 +02:00

cpuidle.h

cpuidle/coupled: Add sanity check for safe_state_index

2015-09-03 03:05:47 +02:00

driver.c

nmi_backtrace: generate one-line reports for idle cpus

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

dt_idle_states.c

Merge back earlier cpuidle material for 3.19-rc1.

2014-11-21 16:31:42 +01:00

dt_idle_states.h

drivers: cpuidle: implement DT based idle states infrastructure

2014-09-25 10:52:20 +02:00

governor.c

cpuidle: Replace strnicmp with strncasecmp

2014-09-25 01:17:10 +02:00

Kconfig

cpuidle: Don't enable all governors by default

2016-01-15 22:39:58 +01:00

Kconfig.arm

ARM: cpuidle: Enable the ARM64 driver for both ARM32/ARM64

2015-03-24 10:16:11 +01:00

Kconfig.mips

MIPS: Kconfig: Add missing MIPS_CPS dependencies to PM and cpuidle

2014-10-23 19:58:05 +02:00

Kconfig.powerpc

…

Makefile

ARM: cpuidle: Enable the ARM64 driver for both ARM32/ARM64

2015-03-24 10:16:11 +01:00

sysfs.c

cpuidle: remove state_count field from struct cpuidle_device

2015-04-03 13:15:50 +02:00