kernel_optimize_test/arch/hexagon/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
dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
head.S
hexagon_ksyms.c arch: hexagon: kernel: hexagon_ksyms.c: export related symbols which various modules need 2014-04-04 18:20:00 -05:00
irq_cpu.c
kgdb.c hexagon: Fix misspellings in comments. 2016-04-18 12:45:54 +02:00
Makefile Hexagon: add screen_info for VGA_CONSOLE 2014-04-04 18:20:01 -05:00
module.c
process.c exit_thread: remove empty bodies 2016-05-20 17:58:30 -07:00
ptrace.c Hexagon: set the e_flags in user regset view for core dumps 2014-04-04 18:20:02 -05:00
reset.c arch: hexagon: kernel: reset.c: use function pointer instead of function for pm_power_off and export it 2014-04-04 18:20:00 -05:00
screen_info.c Hexagon: add screen_info for VGA_CONSOLE 2014-04-04 18:20:01 -05:00
setup.c hexagon: Fix build failures in linux-next 2014-12-16 13:27:12 -06:00
signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
smp.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
stacktrace.c
syscalltab.c
time.c hexagon/time: Migrate to new 'set-state' interface 2015-09-08 18:43:17 -05:00
trampoline.S
traps.c Hexagon: fix signal delivery for debug traps 2014-12-16 13:27:39 -06:00
vdso.c vdso: make arch_setup_additional_pages wait for mmap_sem for write killable 2016-05-23 17:04:14 -07:00
vm_entry.S
vm_events.c
vm_init_segtable.S
vm_ops.S hexagon: Fix misspellings in comments. 2016-04-18 12:45:54 +02:00
vm_switch.S
vm_vectors.S
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00