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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
..
perf metag/perf: Convert to hotplug state machine 2016-07-15 10:40:27 +02:00
.gitignore metag: Build infrastructure 2013-03-02 20:09:54 +00:00
Makefile metag: Add JTAG Debug Adapter (DA) support 2013-03-02 20:09:56 +00:00
asm-offsets.c metag: Build infrastructure 2013-03-02 20:09:54 +00:00
cachepart.c metag: Fix typos 2016-07-15 09:55:49 +01:00
clock.c metag: log core and timer frequencies from arch code 2013-06-13 12:55:27 +01:00
core_reg.c metag: SMP support 2013-03-02 20:09:51 +00:00
da.c metag: export _metag_da_present and cpu_2_hwthread_id 2013-03-27 14:37:52 +00:00
devtree.c metag: use common of_flat_dt_match_machine 2013-10-09 20:03:57 -05:00
dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
ftrace.c metag: ftrace: remove the misleading comment for ftrace_dyn_arch_init 2016-04-29 22:37:51 +01:00
ftrace_stub.S metag: ftrace: Remove check of obsolete variable function_trace_stop 2014-07-18 13:58:09 -04:00
head.S metag: smp: copy cache partition and enable GCOn 2013-03-15 13:21:17 +00:00
irq.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
kick.c metag: kick: add missing irq_enter/exit to kick_handler() 2013-07-02 14:12:08 +01:00
machines.c
…
metag_ksyms.c metag: move EXPORT_SYMBOL(csum_partial) to metag_ksyms.c 2013-07-04 10:00:02 +01:00
module.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
perf_callchain.c perf core: Add a 'nr' field to perf_event_callchain_context 2016-05-16 23:11:51 -03:00
process.c exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
ptrace.c metag: ptrace: Implement NT_METAG_TLS 2013-03-27 14:37:47 +00:00
setup.c metag: Remove unnecessary of_platform_populate with default match table 2016-06-23 15:00:26 -05:00
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 metag: Stack unwinding 2013-03-02 20:09:52 +00:00
sys_metag.c metag: System Calls 2013-03-02 20:09:49 +00:00
tbiunexp.S metag: Traps 2013-03-02 20:09:45 +00:00
tcm.c
…
time.c metag: init common clk and use "core" clk 2013-06-13 12:54:41 +01:00
topology.c metag: topology: export 'cpu_core_map' 2013-12-19 11:36:13 +00:00
traps.c metag: handle low level kicks directly 2013-11-06 10:40:02 +00:00
user_gateway.S metag: System Calls 2013-03-02 20:09:49 +00:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00