#ifndef LOCKME_H #define LOCKME_H #include #include "die.h" static inline void xlockme(void) { if (mlockall(MCL_CURRENT | MCL_FUTURE) != 0) panic("Cannot lock pages!\n"); } static inline void xunlockme(void) { munlockall(); } #endif /* LOCKME_H */ t.distanz.ch/cgit.cgi/linux/net-next.git/atom/?h=master' type='application/atom+xml'/>
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorBaolin Wang <baolin.wang@linaro.org>2016-11-28 14:35:21 -0800
committerThomas Gleixner <tglx@linutronix.de>2016-12-01 14:45:08 +0100
commit4a057549d6044c2dea47e80f8369a76225ec9d90 (patch)
treee2951737c3fcee363a24c6bc2f09be6e8ae9129b
parent2924ecd441f3c12da59b297daade265f49d0831b (diff)
alarmtimer: Add tracepoints for alarm timers
Alarm timers are one of the mechanisms to wake up a system from suspend, but there exist no tracepoints to analyse which process/thread armed an alarmtimer. Add tracepoints for start/cancel/expire of individual alarm timers and one for tracing the suspend time decision when to resume the system. The following trace excerpt illustrates the new mechanism: Binder:3292_2-3304 [000] d..2 149.981123: alarmtimer_cancel: alarmtimer:ffffffc1319a7800 type:REALTIME expires:1325463120000000000 now:1325376810370370245 Binder:3292_2-3304 [000] d..2 149.981136: alarmtimer_start: alarmtimer:ffffffc1319a7800 type:REALTIME expires:1325376840000000000 now:1325376810370384591 Binder:3292_9-3953 [000] d..2 150.212991: alarmtimer_cancel: alarmtimer:ffffffc1319a5a00 type:BOOTTIME expires:179552000000 now:150154008122 Binder:3292_9-3953 [000] d..2 150.213006: alarmtimer_start: alarmtimer:ffffffc1319a5a00 type:BOOTTIME expires:179551000000 now:150154025622 system_server-3000 [002] ...1 162.701940: alarmtimer_suspend: alarmtimer type:REALTIME expires:1325376840000000000 The wakeup time which is selected at suspend time allows to map it back to the task arming the timer: Binder:3292_2. [ tglx: Store alarm timer expiry time instead of some useless RTC relative information, add proper type information for wakeups which are handled via the clock_nanosleep/freezer and massage the changelog. ] Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: John Stultz <john.stultz@linaro.org> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Richard Cochran <richardcochran@gmail.com> Link: http://lkml.kernel.org/r/1480372524-15181-5-git-send-email-john.stultz@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat