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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 05:04:00 +08:00
linux-next/arch/xtensa/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 xtensa: tell git to ignore generated files 2013-06-05 10:14:19 -07:00
align.S xtensa: allow single-stepping through unaligned load/store 2014-08-14 11:59:30 +04:00
asm-offsets.c xtensa: support hardware breakpoints/watchpoints 2016-03-11 08:53:32 +00:00
coprocessor.S xtensa: keep a3 and excsave1 on entry to exception handlers 2013-09-06 09:47:41 -07:00
entry.S xtensa: cleanup MMU setup and kernel layout macros 2016-07-24 06:33:58 +03:00
head.S xtensa: cleanup MMU setup and kernel layout macros 2016-07-24 06:33:58 +03:00
hw_breakpoint.c xtensa: support hardware breakpoints/watchpoints 2016-03-11 08:53:32 +00:00
irq.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
Makefile xtensa: support hardware breakpoints/watchpoints 2016-03-11 08:53:32 +00:00
mcount.S xtensa: add static function tracer support 2013-07-08 01:18:57 -07:00
module.c xtensa: clean up files to make them code-style compliant 2012-12-18 21:10:25 -08:00
mxhead.S xtensa: drop unused sections and remapped reset handlers 2015-11-03 17:19:39 +03:00
pci-dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
pci.c PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code" 2015-09-15 13:18:04 -05:00
perf_event.c xtensa/perf: Convert the hotplug notifier to state machine callbacks 2016-07-14 09:34:41 +02:00
platform.c xtensa: cleanup ccount frequency tracking 2013-07-08 01:11:37 -07:00
process.c exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
ptrace.c xtensa: support hardware breakpoints/watchpoints 2016-03-11 08:53:32 +00:00
setup.c Xtensa improvements for 4.9: 2016-10-05 17:44:48 -07:00
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 arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
stacktrace.c xtensa: move oprofile stack tracing to stacktrace.c 2015-08-17 07:32:49 +03:00
syscall.c xtensa: nommu: don't provide arch_get_unmapped_area 2014-10-21 13:28:48 +04:00
time.c xtensa: rearrange CCOUNT calibration 2016-09-20 18:52:59 -07:00
traps.c xtensa: support hardware breakpoints/watchpoints 2016-03-11 08:53:32 +00:00
vectors.S xtensa: use context structure for debug exceptions 2016-03-11 08:53:32 +00:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
xtensa_ksyms.c xtensa: export __{invalidate,flush}_dcache_range 2014-04-02 01:35:50 +04:00