linux/arch/m32r/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
..
.gitignore m32r: add kernel/.gitignore and ignore vmlinux.lds 2010-10-15 19:37:50 -07:00
align.c
asm-offsets.c m32r: Autogenerate offsets in struct thread_info 2015-04-12 20:58:24 +02:00
entry.S m32r: Autogenerate offsets in struct thread_info 2015-04-12 20:58:24 +02:00
head.S m32r: Move the spi_stack_top and spu_stack_top into .init.data section. 2009-09-23 00:29:40 +09:00
irq.c m32r: Use generic show_interrupts() 2011-03-24 20:35:57 +01:00
m32r_ksyms.c m32r: add __ucmpdi2 to fix build failure 2016-07-26 16:19:19 -07:00
Makefile m32r: Use generic init_task 2012-05-05 13:00:23 +02:00
module.c Make most arch asm/module.h files use asm-generic/module.h 2012-09-28 14:31:03 +09:30
process.c exit_thread: remove empty bodies 2016-05-20 17:58:30 -07:00
ptrace.c m32r: fix 'fix breakage from "m32r: use generic ptrace_resume code"' fallout 2012-07-17 16:21:30 -07:00
setup.c arch: Set IORESOURCE_SYSTEM_RAM flag for System RAM 2016-01-30 09:49:57 +01:00
signal.c Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc 2015-04-15 13:53:55 -07:00
smp.c m32r: fix build failure 2016-05-23 17:04:14 -07:00
smpboot.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
sys_m32r.c m32r: switch to generic kernel_thread()/kernel_execve() 2012-10-31 22:59:31 -04:00
syscall_table.S All Arch: remove linkage for sys_nfsservctl system call 2011-08-26 15:09:58 -07:00
time.c m32r: remove deprecated IRQF_DISABLED 2014-10-09 22:25:46 -04:00
traps.c dump_stack: consolidate dump_stack() implementations and unify their behaviors 2013-04-30 17:04:02 -07:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00