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linux-next/arch/c6x
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
..
boot c6x: use new common dtc rule 2012-12-03 17:17:49 -06:00
configs C6X: add basic support for TMS320C6678 SoC 2012-07-18 23:52:31 -04:00
include dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
kernel nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
lib C6X: library code 2011-10-06 19:48:23 -04:00
mm dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
platforms c6x: Remove unnecessary of_platform_populate with default match table 2016-06-23 14:59:39 -05:00
Kconfig mn10300, c6x: CONFIG_GENERIC_BUG must depend on CONFIG_BUG 2016-03-17 15:09:34 -07:00
Makefile c6x: Makefile: Add -D__linux__ 2015-03-26 10:31:47 -04:00