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6727ad9e20
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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
..
.gitignore
alpha_ksyms.c alpha: Eliminate compiler warning from memset macro 2013-11-16 16:33:09 -08:00
asm-offsets.c
audit.c alpha: Enable system-call auditing support. 2014-01-31 09:21:55 -08:00
binfmt_loader.c get rid of pt_regs argument of ->load_binary() 2012-11-28 21:53:38 -05:00
console.c TTY:vt: convert remain take_over_console's users to do_take_over_console 2013-05-20 22:29:27 -07:00
core_apecs.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
core_cia.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
core_irongate.c PCI: Remove unnecessary #includes of <asm/pci.h> 2015-06-08 07:56:09 -05:00
core_lca.c Fix common misspellings 2011-03-31 11:26:23 -03:00
core_marvel.c char/genrtc: remove alpha support 2016-06-04 00:23:02 +02:00
core_mcpcia.c alpha: Remove set but unused variables. 2011-04-17 14:41:30 -07:00
core_polaris.c
core_t2.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
core_titan.c arch/alpha/kernel: Add kmalloc NULL tests 2009-11-30 15:38:19 -05:00
core_tsunami.c alpha: include module.h to fix modpost on Tsunami 2012-05-02 15:54:06 -04:00
core_wildfire.c
entry.S alpha: Enable system-call auditing support. 2014-01-31 09:21:55 -08:00
err_common.c
err_ev6.c alpha: delete non-required instances of <linux/init.h> 2015-05-26 10:01:48 -07:00
err_ev7.c
err_impl.h Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
err_marvel.c Fix common misspellings 2011-03-31 11:26:23 -03:00
err_titan.c alpha: Remove set but unused variables. 2011-04-17 14:41:30 -07:00
es1888.c
gct.c
head.S Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
io.c
irq_alpha.c alpha: Use qemu+cserve provided high-res clock and alarm. 2013-11-16 16:33:21 -08:00
irq_i8259.c alpha: Convert to new irq function names 2011-03-29 14:47:58 +02:00
irq_impl.h alpha: i8259, alcor, jensen wildfire: Convert irq_chip 2011-03-02 14:57:55 -05:00
irq_pyxis.c alpha: Convert to new irq function names 2011-03-29 14:47:58 +02:00
irq_srm.c alpha: Convert to new irq function names 2011-03-29 14:47:58 +02:00
irq.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
machvec_impl.h treewide: replace obsolete _refok by __ref 2016-08-02 17:31:41 -04:00
Makefile alpha: Enable system-call auditing support. 2014-01-31 09:21:55 -08:00
module.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
osf_sys.c give readdir(2)/getdents(2)/etc. uniform exclusion with lseek() 2016-05-02 19:49:28 -04:00
pc873xx.c alpha: Detect Super IO chip, no IDE on Avanti, enable EPP19 2010-06-15 14:19:08 -04:00
pc873xx.h alpha: Detect Super IO chip, no IDE on Avanti, enable EPP19 2010-06-15 14:19:08 -04:00
pci_impl.h alpha/PCI: replace pci_probe_only with pci_flags 2012-02-23 20:18:56 -07:00
pci_iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
pci-noop.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
pci-sysfs.c alpha/PCI: Call iomem_is_exclusive() for IORESOURCE_MEM, but not IORESOURCE_IO 2016-04-25 15:59:50 -05:00
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 alpha: Replace __get_cpu_var 2014-08-26 13:45:53 -04:00
process.c exit_thread: remove empty bodies 2016-05-20 17:58:30 -07:00
proto.h alpha: Use qemu+cserve provided high-res clock and alarm. 2013-11-16 16:33:21 -08:00
ptrace.c ARCH: AUDIT: audit_syscall_entry() should not require the arch 2014-09-23 16:21:26 -04:00
rtc.c rtc: cmos: move mc146818rtc code out of asm-generic/rtc.h 2016-06-04 00:20:00 +02:00
setup.c alpha: Allow HZ to be configured 2013-11-16 16:33:13 -08:00
signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
smc37c93x.c alpha: Remove set but unused variables. 2011-04-17 14:41:30 -07:00
smc37c669.c alpha: remove mysterious if zero-ed out includes 2012-07-30 17:25:11 -07:00
smp.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
srm_env.c srm_env: don't bother with pointer to srm_env_t 2013-04-09 14:13:33 -04:00
srmcons.c alpha: don't use module_init for non-modular core code 2015-05-26 10:01:47 -07:00
sys_alcor.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_cabriolet.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_dp264.c alpha: Don't if-out dp264_device_interrupt. 2013-07-19 13:54:26 -07:00
sys_eb64p.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_eiger.c PCI: Remove unnecessary #includes of <asm/pci.h> 2015-06-08 07:56:09 -05:00
sys_jensen.c alpha: Reorganize rtc handling 2013-11-16 16:33:16 -08:00
sys_marvel.c alpha: clean up unnecessary MSI/MSI-X capability find 2015-05-26 10:01:44 -07:00
sys_miata.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_mikasa.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_nautilus.c PCI: Remove unnecessary #includes of <asm/pci.h> 2015-06-08 07:56:09 -05:00
sys_noritake.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_rawhide.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_ruffian.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_rx164.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_sable.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_sio.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_sx164.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_takara.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
sys_titan.c alpha: irq: remove deprecated use of IRQF_DISABLED 2013-04-07 12:59:30 -07:00
sys_wildfire.c Disintegrate asm/system.h for Alpha 2012-03-28 18:11:12 +01:00
systbls.S alpha: Wire up all missing implemented syscalls 2015-05-26 10:01:50 -07:00
time.c alpha/time: Migrate to new 'set-state' interface 2015-08-10 11:40:58 +02:00
traps.c alpha: delete non-required instances of <linux/init.h> 2015-05-26 10:01:48 -07:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00