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Linus Torvalds 9269d27e51 Updates to the tick/nohz code in this cycle: 
- Micro-optimize tick_nohz_full_cpu()
 
  - Optimize idle exit tick restarts to be less eager
 
  - Optimize tick_nohz_dep_set_task() to only wake up
    a single CPU. This reduces IPIs and interruptions
    on nohz_full CPUs.
 
  - Optimize tick_nohz_dep_set_signal() in a similar
    fashion.
 
  - Skip IPIs in tick_nohz_kick_task() when trying
    to kick a non-running task.
 
  - Micro-optimize tick_nohz_task_switch() IRQ flags
    handling to reduce context switching costs.
 
  - Misc cleanups and fixes
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'timers-nohz-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timers/nohz updates from Ingo Molnar:

 - Micro-optimize tick_nohz_full_cpu()

 - Optimize idle exit tick restarts to be less eager

 - Optimize tick_nohz_dep_set_task() to only wake up a single CPU.
   This reduces IPIs and interruptions on nohz_full CPUs.

 - Optimize tick_nohz_dep_set_signal() in a similar fashion.

 - Skip IPIs in tick_nohz_kick_task() when trying to kick a
   non-running task.

 - Micro-optimize tick_nohz_task_switch() IRQ flags handling to
   reduce context switching costs.

 - Misc cleanups and fixes

* tag 'timers-nohz-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  MAINTAINERS: Add myself as context tracking maintainer
  tick/nohz: Call tick_nohz_task_switch() with interrupts disabled
  tick/nohz: Kick only _queued_ task whose tick dependency is updated
  tick/nohz: Change signal tick dependency to wake up CPUs of member tasks
  tick/nohz: Only wake up a single target cpu when kicking a task
  tick/nohz: Update nohz_full Kconfig help
  tick/nohz: Update idle_exittime on actual idle exit
  tick/nohz: Remove superflous check for CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  tick/nohz: Conditionally restart tick on idle exit
  tick/nohz: Evaluate the CPU expression after the static key
2021-06-28 12:22:06 -07:00
..
alarmtimer.c alarmtimer: Check RTC features instead of ops 2021-05-11 21:28:04 +02:00
clockevents.c tick: Remove outgoing CPU from broadcast masks 2019-03-23 18:26:43 +01:00
clocksource.c ARM: 2021-05-01 10:14:08 -07:00
hrtimer.c The time and timers updates contain: 2021-04-26 09:54:03 -07:00
itimer.c time: Prevent undefined behaviour in timespec64_to_ns() 2020-10-26 11:48:11 +01:00
jiffies.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
Kconfig tick/nohz: Update nohz_full Kconfig help 2021-05-13 14:21:21 +02:00
Makefile timekeeping: add CONFIG_LEGACY_TIMER_TICK 2020-10-30 21:57:04 +01:00
namespace.c timens: Delete no-op time_ns_init() 2021-02-05 19:32:09 +01:00
ntp_internal.h ntp: Make the RTC synchronization more reliable 2020-12-11 10:40:52 +01:00
ntp.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +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 tick/nohz: Change signal tick dependency to wake up CPUs of member tasks 2021-05-13 14:21:22 +02:00
posix-stubs.c posix-timers: Make clock_nanosleep() time namespace aware 2020-01-14 12:20:55 +01:00
posix-timers.c posix-timers: Preserve return value in clock_adjtime32() 2021-04-17 14:55:06 +02:00
posix-timers.h posix-clocks: Introduce clock_get_ktime() callback 2020-01-14 12:20:51 +01:00
sched_clock.c time/sched_clock: Mark sched_clock_read_begin/retry() as notrace 2020-10-26 11:34:31 +01:00
test_udelay.c time/debug: Remove dentry pointer for debugfs 2021-03-18 11:20:26 +01:00
tick-broadcast-hrtimer.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
tick-broadcast.c tick/broadcast: Allow late registered device to enter oneshot mode 2021-04-16 21:03:50 +02:00
tick-common.c tick: Use tick_check_replacement() instead of open coding it 2021-04-16 21:03:50 +02:00
tick-internal.h tick: Get rid of tick_period 2020-11-19 10:48:29 +01:00
tick-legacy.c timekeeping: remove xtime_update 2020-10-30 21:57:07 +01:00
tick-oneshot.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
tick-sched.c Updates to the tick/nohz code in this cycle: 2021-06-28 12:22:06 -07:00
tick-sched.h timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
time.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
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/timecounter: Mark 1st argument of timecounter_cyc2time() as const 2021-04-16 21:03:50 +02:00
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 ARM: 2021-05-01 10:14:08 -07:00
timekeeping.h asm-generic: cross-architecture timer cleanup 2020-12-16 00:07:17 -08:00
timer_list.c timer_list: Use printk format instead of open-coded symbol lookup 2020-11-15 20:47:14 +01:00
timer.c sched,timer: Use __set_current_state() 2021-06-18 11:43:08 +02:00
vsyscall.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00