John Stultz 4a1101d81d timekeeping: Fix leapsecond triggered load spike issue ... This is a backport of 4873fa070a The timekeeping code misses an update of the hrtimer subsystem after a leap second happened. Due to that timers based on CLOCK_REALTIME are either expiring a second early or late depending on whether a leap second has been inserted or deleted until an operation is initiated which causes that update. Unless the update happens by some other means this discrepancy between the timekeeping and the hrtimer data stays forever and timers are expired either early or late. The reported immediate workaround - $ data -s "`date`" - is causing a call to clock_was_set() which updates the hrtimer data structures. See: http://www.sheeri.com/content/mysql-and-leap-second-high-cpu-and-fix Add the missing clock_was_set() call to update_wall_time() in case of a leap second event. The actual update is deferred to softirq context as the necessary smp function call cannot be invoked from hard interrupt context. Signed-off-by: John Stultz <johnstul@us.ibm.com> Reported-by: Jan Engelhardt <jengelh@inai.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1341960205-56738-3-git-send-email-johnstul@us.ibm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-08-25 20:00:16 +03:00
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alarmtimer.c	kernel: alarm: Increase power-on alarm before alarm time to 300 sec	2017-08-25 20:00:10 +03:00
clockevents.c	Revert "clockevents: Set noop handler in clockevents_exchange_device()"	2011-12-30 13:24:40 -08:00
clocksource.c	clocksource: Fix abs() usage w/ 64bit values	2017-08-25 20:00:11 +03:00
jiffies.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
Kconfig	tick: Document TICK_ONESHOT config option	2012-03-31 12:45:43 +02:00
Makefile	Revert "HACK: time: Disable alarmtimer"	2017-08-25 16:03:46 +03:00
ntp.c	ntp: Fix STA_INS/DEL clearing bug	2017-08-25 20:00:14 +03:00
posix-clock.c	kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure	2011-10-31 19:30:05 -04:00
tick-broadcast.c	tick: Dynamically set broadcast irq affinity	2017-08-25 16:04:02 +03:00
tick-common.c	clockevents: Make minimum delay adjustments configurable	2011-09-08 11:10:56 +02:00
tick-internal.h	clockevents: Make minimum delay adjustments configurable	2011-09-08 11:10:56 +02:00
tick-oneshot.c	clockevents: Make minimum delay adjustments configurable	2011-09-08 11:10:56 +02:00
tick-sched.c	Revert "sched: reinitialize rq->next_balance when a CPU is hot-added"	2017-08-25 16:04:32 +03:00
timecompare.c
timeconv.c
timekeeping.c	timekeeping: Fix leapsecond triggered load spike issue	2017-08-25 20:00:16 +03:00
timer_list.c	time: Remove CONFIG_TIMER_STATS	2017-07-02 13:03:26 +03:00