linux/arch/c6x/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 sanitize tsk_is_polling() 2012-10-01 09:58:13 -04:00
c6x_ksyms.c C6X: loadable module support 2011-10-06 19:48:13 -04:00
devicetree.c of: remove early_init_dt_setup_initrd_arch 2013-10-09 11:39:01 -05:00
dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
entry.S c6x: switch to generic sigaltstack 2013-02-03 18:15:52 -05:00
head.S C6X: early boot code 2011-10-06 19:47:28 -04:00
irq.c C6X: remove dependence on legacy IRQs 2012-07-18 23:49:40 -04:00
Makefile
module.c C6X: loadable module support 2011-10-06 19:48:13 -04:00
process.c exit_thread: remove empty bodies 2016-05-20 17:58:30 -07:00
ptrace.c C6X: ptrace support 2011-10-06 19:48:17 -04:00
setup.c locking/lockdep: Eliminate lockdep_init() 2016-02-09 12:03:25 +01:00
signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
soc.c arch: Use eth_random_addr 2012-07-16 22:39:25 -07:00
switch_to.S C6X: process management 2011-10-06 19:47:40 -04:00
sys_c6x.c C6X: syscalls 2011-10-06 19:47:58 -04:00
time.c C6x: time: Ensure consistency in __init 2015-03-26 10:31:47 -04:00
traps.c dump_stack: unify debug information printed by show_regs() 2013-04-30 17:04:02 -07:00
vectors.S C6X: early boot code 2011-10-06 19:47:28 -04:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00