linux_dsm_epyc7002/arch/h8300/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
..
asm-offsets.c h8300: miscellaneous functions 2015-06-23 13:35:53 +09:00
dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
entry.S h8300: System call entry enable interrupt. 2016-01-20 23:28:01 +09:00
h8300_ksyms.c h8300: miscellaneous functions 2015-06-23 13:35:53 +09:00
head_ram.S h8300: Low level entry 2015-06-23 13:35:51 +09:00
head_rom.S h8300: Low level entry 2015-06-23 13:35:51 +09:00
irq.c h8300: Interrupt and exceptions 2015-06-23 13:35:50 +09:00
kgdb.c h8300: Add KGDB support. 2016-01-20 23:27:30 +09:00
Makefile h8300: Add KGDB support. 2016-01-20 23:27:30 +09:00
module.c h8300: miscellaneous functions 2015-06-23 13:35:53 +09:00
process.c h8300: process helpers 2015-06-23 13:35:52 +09:00
ptrace_h.c h8300: process helpers 2015-06-23 13:35:52 +09:00
ptrace_s.c h8300: process helpers 2015-06-23 13:35:52 +09:00
ptrace.c h8300: process helpers 2015-06-23 13:35:52 +09:00
setup.c h8300: switch EARLYCON 2016-03-25 01:45:19 +09:00
signal.c h8300: signal stack fix 2016-01-20 22:44:13 +09:00
sim-console.c h8300: switch EARLYCON 2016-03-25 01:45:19 +09:00
syscalls.c h8300: miscellaneous functions 2015-06-23 13:35:53 +09:00
traps.c h8300: show_stack cleanup 2016-01-20 23:28:00 +09:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00