Thomas Gleixner 372acbbaa8 tick/sched: Use tick_next_period for lockless quick check ...

No point in doing calculations.

   tick_next_period = last_jiffies_update + tick_period

Just check whether now is before tick_next_period to figure out whether
jiffies need an update.

Add a comment why the intentional data race in the quick check is safe or
not so safe in a 32bit corner case and why we don't worry about it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201117132006.337366695@linutronix.de

2020-11-19 10:48:29 +01:00

..

alarmtimer.c

alarmtimer: Convert comma to semicolon

2020-08-25 12:45:53 +02:00

clockevents.c

tick: Remove outgoing CPU from broadcast masks

2019-03-23 18:26:43 +01:00

clocksource.c

clocksource: Remove obsolete ifdef

2020-06-09 16:36:47 +02:00

hrtimer.c

hrtimer: Fix kernel-doc markups

2020-11-16 15:20:01 +01:00

itimer.c

y2038: rename itimerval to __kernel_old_itimerval

2019-12-18 18:07:33 +01:00

jiffies.c

timekeeping: Convert jiffies_seq to seqcount_raw_spinlock_t

2020-10-26 11:04:14 +01:00

Kconfig

posix-cpu-timers: Provide mechanisms to defer timer handling to task_work

2020-08-06 16:50:59 +02:00

Makefile

ns: Introduce Time Namespace

2020-01-14 12:20:48 +01:00

namespace.c

nsproxy: support CLONE_NEWTIME with setns()

2020-07-08 11:14:22 +02:00

ntp_internal.h

ntp: Audit NTP parameters adjustment

2019-04-15 18:14:01 -04:00

ntp.c

ntp/y2038: Remove incorrect time_t truncation

2019-11-12 08:13:44 +01:00

posix-clock.c

posix-clocks: Rename the clock_get() callback to clock_get_timespec()

2020-01-14 12:20:49 +01:00

posix-cpu-timers.c

posix-cpu-timers: Provide mechanisms to defer timer handling to task_work

2020-08-06 16:50:59 +02:00

posix-stubs.c

posix-timers: Make clock_nanosleep() time namespace aware

2020-01-14 12:20:55 +01:00

posix-timers.c

treewide: Use fallthrough pseudo-keyword

2020-08-23 17:36:59 -05:00

posix-timers.h

posix-clocks: Introduce clock_get_ktime() callback

2020-01-14 12:20:51 +01:00

sched_clock.c

time/sched_clock: Use seqcount_latch_t

2020-09-10 11:19:29 +02:00

test_udelay.c

time/debug: Remove license boilerplate

2018-11-23 11:51:21 +01:00

tick-broadcast-hrtimer.c

tick: broadcast-hrtimer: Fix a race in bc_set_next

2019-09-27 14:45:55 +02:00

tick-broadcast.c

tick/broadcast: Serialize access to tick_next_period

2020-11-19 10:48:28 +01:00

tick-common.c

tick: Document protections for tick related data

2020-11-19 10:48:28 +01:00

tick-internal.h

tick: Remove outgoing CPU from broadcast masks

2019-03-23 18:26:43 +01:00

tick-oneshot.c

hrtimers/tick/clockevents: Remove sloppy license references

2018-11-23 11:51:21 +01:00

tick-sched.c

tick/sched: Use tick_next_period for lockless quick check

2020-11-19 10:48:29 +01:00

tick-sched.h

tick/sched: Update tick_sched struct documentation

2019-03-24 20:29:32 +01:00

time.c

y2038: remove unused time32 interfaces

2020-02-21 11:22:15 -08:00

timeconst.bc

time: Add SPDX license identifiers

2018-11-23 11:51:20 +01:00

timeconv.c

time: Add missing colons for parameter documentation of time64_to_tm()

2020-11-15 23:47:23 +01:00

timecounter.c

time: Remove license boilerplate

2018-11-23 11:51:21 +01:00

timekeeping_debug.c

timekeeping/debug: No need to check return value of debugfs_create functions

2019-01-29 20:08:41 +01:00

timekeeping_internal.h

timekeeping/vsyscall: Provide vdso_update_begin/end()

2020-08-06 10:57:30 +02:00

timekeeping.c

timekeeping: Address parameter documentation issues for various functions

2020-11-15 23:47:24 +01:00

timekeeping.h

timekeeping: Convert jiffies_seq to seqcount_raw_spinlock_t

2020-10-26 11:04:14 +01:00

timer_list.c

timer_list: Use printk format instead of open-coded symbol lookup

2020-11-15 20:47:14 +01:00

timer.c

timers: Make run_local_timers() static

2020-11-16 15:20:01 +01:00

vsyscall.c

timekeeping/vsyscall: Provide vdso_update_begin/end()

2020-08-06 10:57:30 +02:00