linux/arch/cris/kernel
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
..
Makefile CRIS: add STACKTRACE_SUPPORT 2015-09-05 00:56:50 +02:00
asm-offsets.c
crisksyms.c cris: Drop reference to get_cmos_time() 2015-11-02 20:03:05 +01:00
devicetree.c CRISv32: add device tree support 2015-03-25 09:49:48 +01:00
irq.c CRISv32: add support for irqflags tracing 2015-09-05 00:56:49 +02:00
module.c module: remove mod arg from module_free, rename module_memfree(). 2015-01-20 11:38:33 +10:30
process.c
profile.c
ptrace.c CRISv32: handle multiple signals 2015-03-25 10:53:54 +01:00
setup.c cris: Remove unnecessary of_platform_populate with default match table 2016-06-23 15:00:22 -05:00
stacktrace.c CRIS: add STACKTRACE_SUPPORT 2015-09-05 00:56:50 +02:00
sys_cris.c
time.c cris: time: Cleanup of persistent clock stuff 2015-11-02 20:03:05 +01:00
traps.c
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00