linux/arch/powerpc
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 Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-08-02 16:37:12 -04:00
configs powerpc updates for 4.8 # 1 2016-07-30 21:01:36 -07:00
crypto crypto: crc32c-vpmsum - Convert to CPU feature based module autoloading 2016-08-09 14:50:17 +10:00
include powerpc: implement arch_reserved_kernel_pages 2016-10-07 18:46:28 -07:00
kernel nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
kvm KVM: PPC: Book3s PR: Allow access to unprivileged MMCR2 register 2016-09-27 15:14:29 +10:00
lib powerpc/32: Fix again csum_partial_copy_generic() 2016-09-08 13:15:02 +10:00
math-emu
mm KVM updates for v4.9-rc1 2016-10-06 10:49:01 -07:00
net powerpc/ebpf/jit: Implement JIT compiler for extended BPF 2016-06-24 15:17:57 +10:00
oprofile powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
perf powerpc/perf: Fix incorrect event codes in power9-event-list 2016-08-04 20:22:34 +10:00
platforms KVM updates for v4.9-rc1 2016-10-06 10:49:01 -07:00
scripts powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel 2016-03-07 14:53:56 +11:00
sysdev powerpc/xics/opal: Fix processor numbers in OPAL ICP 2016-09-06 14:54:45 +10:00
xmon powerpc: Move cpu_has_feature() to a separate file 2016-08-01 11:15:03 +10:00
Kconfig atomic64: no need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 2016-10-07 18:46:30 -07:00
Kconfig.debug powerpc/mm: Catch usage of cpu/mmu_has_feature() before jump label init 2016-08-01 11:15:06 +10:00
Makefile powerpc/Makefile: Use cflags-y/aflags-y for setting endian options 2016-08-10 23:01:53 +10:00
relocs_check.sh powerpc: Convert relocs_check to a shell script using grep 2015-03-23 14:47:39 +11:00