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26456f87ac
linux/kernel/time
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Thomas Gleixner 26456f87ac timers: Reinitialize per cpu bases on hotplug 
The timer wheel bases are not (re)initialized on CPU hotplug. That leaves
them with a potentially stale clk and next_expiry valuem, which can cause
trouble then the CPU is plugged.

Add a prepare callback which forwards the clock, sets next_expiry to far in
the future and reset the control flags to a known state.

Set base->must_forward_clk so the first timer which is queued will try to
forward the clock to current jiffies.

Fixes: 500462a9de ("timers: Switch to a non-cascading wheel")
Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1712272152200.2431@nanos
2017-12-29 23:13:09 +01:00
..
alarmtimer.c alarmtimer: Ensure RTC module is not unloaded 2017-08-31 21:36:45 +02:00
clockevents.c clockevents: Retry programming min delta up to 10 times 2017-10-19 16:29:15 +02:00
clocksource.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
hrtimer.c timers/hrtimer: Use lockdep to assert IRQs are disabled/enabled 2017-11-08 11:13:49 +01:00
itimer.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
jiffies.c jiffies: Revert bogus conversion of NSEC_PER_SEC to TICK_NSEC 2017-03-07 11:03:28 +01:00
Kconfig timekeeping: Remove CONFIG_GENERIC_TIME_VSYSCALL_OLD 2017-11-14 11:20:25 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ntp_internal.h Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
ntp.c Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
posix-clock.c posix-timers: Move posix-timer internals to core 2017-06-04 15:40:23 +02:00
posix-cpu-timers.c timers/posix-cpu-timers: Use lockdep to assert IRQs are disabled/enabled 2017-11-08 11:13:54 +01:00
posix-stubs.c posix-stubs: Use get_timespec64() and put_timespec64() 2017-10-17 17:22:27 +02:00
posix-timers.c posix-timer: Properly check sigevent->sigev_notify 2017-12-15 11:08:40 +01:00
posix-timers.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sched_clock.c timers, sched_clock: Update timeout for clock wrap 2017-03-23 12:30:27 -07:00
test_udelay.c time: Avoid timespec in udelay_test 2016-06-20 12:47:26 -07:00
tick-broadcast-hrtimer.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tick-broadcast.c tick/broadcast: Make tick_broadcast_setup_oneshot() static 2017-06-12 18:56:01 +02:00
tick-common.c ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
tick-internal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tick-oneshot.c clockevents: Update clockevents device next_event on stop 2017-11-01 18:20:17 +01:00
tick-sched.c cpufreq: schedutil: Use idle_calls counter of the remote CPU 2017-12-28 12:26:54 +01:00
tick-sched.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
time.c Merge branch 'fortglx/4.15/time' of https://git.linaro.org/people/john.stultz/linux into timers/core 2017-10-31 23:17:28 +01:00
timeconst.bc time: Introduce jiffies64_to_nsecs() 2017-02-01 09:13:45 +01:00
timeconv.c time: Add time64_to_tm() 2016-06-20 12:47:15 -07:00
timecounter.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timekeeping_debug.c PM / timekeeping: Print debug messages when requested 2017-07-23 00:03:43 +02:00
timekeeping_internal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
timekeeping.c timekeeping: Remove CONFIG_GENERIC_TIME_VSYSCALL_OLD 2017-11-14 11:20:25 +01:00
timekeeping.h Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
timer_list.c timer/debug: Change /proc/timer_list from 0444 to 0400 2017-11-13 16:04:06 +01:00
timer.c timers: Reinitialize per cpu bases on hotplug 2017-12-29 23:13:09 +01:00