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
bitops: Do not default to __clear_bit() for __clear_bit_unlock()
2016-03-21 10:50:48 +01:00
mm, asm-generic: define PUD_SHIFT in <asm-generic/4level-fixup.h>
2015-02-11 17:06:03 -08:00
asm-generic: Add common asm-offsets.h
2015-06-23 13:35:49 +09:00
locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API
2016-07-07 09:16:20 +02:00
locking/atomic: Remove linux/atomic.h:atomic_fetch_or()
2016-06-16 10:48:32 +02:00
locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
2016-06-16 10:48:32 +02:00
locking/spinlock, arch: Update and fix spin_unlock_wait() implementations
2016-06-14 11:55:15 +02:00
arch: Prepare for smp_mb__{before,after}_atomic()
2014-04-18 11:40:30 +02:00
asm-generic changes for 4.6
2016-03-24 23:13:48 -07:00
ipv4: Update parameters for csum_tcpudp_magic to their original types
2016-03-13 23:55:13 -04:00
asm-generic: COMMON_CLK defines __clk_{get,put}
2014-09-25 18:00:45 -07:00
asm-generic: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations
2015-10-15 00:21:13 +02:00
sched, time: Fix build error with 64 bit cputime_t on 32 bit systems
2014-10-03 05:46:55 +02:00
sched/cputime: Count actually elapsed irq & softirq time
2016-07-14 10:42:34 +02:00
__div64_32(): make it overridable at compile time
2015-11-16 14:42:12 -05:00
asm-generic: Add dma-contiguous.h
2014-09-22 13:35:51 +02:00
Merge branch 'akpm' (patches from Andrew)
2015-09-08 17:52:23 -07:00
asm-generic: Fix local variable shadow in __set_fixmap_offset
2016-02-16 15:10:44 +00:00
asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()
2016-04-21 11:06:09 +02:00
gpio: allow setting ARCH_NR_GPIOS from Kconfig
2016-02-19 00:22:54 +01:00
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
include/asm-generic/ioctl.h: fix _IOC_TYPECHECK sparse error
2014-06-06 16:08:13 -07:00
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
irq_work: Introduce arch_irq_work_has_interrupt()
2014-09-13 18:38:07 +02:00
mm: add PHYS_PFN, use it in __phys_to_pfn()
2016-01-14 16:00:49 -08:00
mm: clean up per architecture MM hook header files
2015-07-17 16:39:53 -07:00
mm/core, x86/mm/pkeys: Differentiate instruction fetches
2016-02-18 19:46:29 +01:00
asm-generic: Remove asm-generic arch_bprm_mm_init()
2014-11-22 21:52:08 +01:00
asm-generic: Add msi.h
2014-11-23 13:01:47 +01:00
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
asm-generic: page.h: Remove useless get_user_page and free_user_page
2016-02-26 15:24:55 +01:00
PCI: Remove unused pcibios_select_root() (again)
2015-06-08 07:56:21 -05:00
PCI: Add pci_iomap_wc() variants
2015-08-25 09:59:45 +02:00
percpu: preffity percpu header files
2014-06-17 19:12:40 -04:00
mm: move phys_mem_access_prot_allowed() declaration to pgtable.h
2016-10-07 18:46:29 -07:00
sched/preempt: Fix preempt_count manipulations
2016-05-17 12:24:21 +02:00
locking/qrwlock: Fix write unlock bug on big endian systems
2016-08-10 14:13:27 +02:00
locking/qrwlock: Rename ->lock to ->wait_lock
2015-09-18 09:27:29 +02:00
locking/qspinlock: Use atomic_sub_return_release() in queued_spin_unlock()
2016-06-08 15:17:01 +02:00
locking/qspinlock: Move __ARCH_SPIN_LOCK_UNLOCKED to qspinlock_types.h
2016-02-29 10:02:43 +01:00
asm-generic: remove _STK_LIM_MAX
2014-05-15 00:32:09 +01:00
locking/rwsem: Remove rwsem_atomic_add() and rwsem_atomic_update()
2016-06-08 15:16:59 +02:00
seccomp: Get compat syscalls from asm-generic header
2016-05-13 14:02:00 +02:00
asm/sections: add helpers to check for section data
2016-01-16 11:17:24 -08:00
SIGNAL: Move generic copy_siginfo() to signal.h
2016-05-13 14:02:10 +02:00
syscall.h: fix doc text for syscall_get_arch()
2014-09-23 16:20:00 -04:00
mm/mmu_gather: track page size with mmu gather and force flush if page size change
2016-07-26 16:19:19 -07:00
Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-09-14 09:35:05 -07:00
asm-generic: allow generic unaligned access if the arch supports it
2014-05-08 10:22:23 +02:00
nmi_backtrace: generate one-line reports for idle cpus
2016-10-07 18:46:30 -07:00
Make asm/word-at-a-time.h available on all architectures
2015-07-08 16:41:55 -04:00
6727ad9e20