linux/kernel/time
Linus Torvalds f24dc33f8e Timer subsystem changes for v6.8:
- Various preparatory cleanups & enhancements of the timer-wheel code,
    in preparation for the WIP 'pull timers at expiry' timer migration model
    series (which will replace the current 'push timers at enqueue' migration
    model), by Anna-Maria Behnsen:
 
       - Update comments and clean up confusing variable names
 
       - Add debug check to warn about time travel
 
       - Improve/expand timer-wheel tracepoints
 
       - Optimize away unnecessary IPIs for deferrable timers
 
       - Restructure & clean up next_expiry_recalc()
 
       - Clean up forward_timer_base()
 
       - Introduce __forward_timer_base() and use it to simplify
         and micro-optimize get_next_timer_interrupt()
 
  - Restructure the get_next_timer_interrupt()'s idle logic
    for better readability and to enable a minor optimization.
 
  - Fix the nextevt calculation when no timers are pending
 
  - Fix the sysfs_get_uname() prototype declaration
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmWb0XIRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1h9kg/9FpjbiogIKrDXb/pJHyhYkK6jzN4aNrQo
 wsOz4FDKyvioqLfr5ndpFE++DwsyzUibPfHJzfwD5IilTyolm2jW44VSCBzNdm72
 lI6NGIcIxmIeCuO4bLmJj/fuQAugQ+ajmA2pyC/aBSO4Q2jtnxjYMGiV9zMWmOsa
 E816CK5zp6IVx+w0GWwK5yW5YR5dscSQCD+mBYVAdTWYoRNTy6xonsMTRuNi0ePx
 donetpu0eWG9NGwUdax/65oKVLZMR/rKAI/3pInhkOS9BsL2o8Rt4o2Y+9aBFi2t
 2m+ZbFg5hngJwhP8Mfc7A+I3qiWgCOMGNGrebyzlwb+0PnNBPzrwnNPveW3R9QRx
 LMxSU3aH66bXeX+YCF4y2tjWSmYooAnztPstUGrs+sq36+NF0wyY6ip/36S6MRGk
 zjedqWnrHQeeZlzOLiKNzB+FIBnOt6bhZEh1Wk1/zwi9UWxw+7+I6tR0b57NqRxZ
 VHq38fp+O2OEAj5JvwJ6FomOd+onqQ2wwveG5OMCa+hwM2ZCuVXQRYgM2ohMfwl3
 BMSd3KMZsBiHT0zyun3k/uJ7CaIjArPh016baSS10ArSl9sE64aJj7ELtuSLqtaD
 idJFXu3tv6VgDT2rMhLWNHvzQoK+gb8+/qnms4Ea+wY2f7nubi0aH20qHfugkgis
 4KOkw9cQw0U=
 =n40J
 -----END PGP SIGNATURE-----

Merge tag 'timers-core-2024-01-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer subsystem updates from Ingo Molnar:

 - Various preparatory cleanups & enhancements of the timer-wheel code,
   in preparation for the WIP 'pull timers at expiry' timer migration
   model series (which will replace the current 'push timers at enqueue'
   migration model), by Anna-Maria Behnsen:

      - Update comments and clean up confusing variable names

      - Add debug check to warn about time travel

      - Improve/expand timer-wheel tracepoints

      - Optimize away unnecessary IPIs for deferrable timers

      - Restructure & clean up next_expiry_recalc()

      - Clean up forward_timer_base()

      - Introduce __forward_timer_base() and use it to simplify and
        micro-optimize get_next_timer_interrupt()

 - Restructure the get_next_timer_interrupt()'s idle logic for better
   readability and to enable a minor optimization.

 - Fix the nextevt calculation when no timers are pending

 - Fix the sysfs_get_uname() prototype declaration

* tag 'timers-core-2024-01-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timers: Fix nextevt calculation when no timers are pending
  timers: Rework idle logic
  timers: Use already existing function for forwarding timer base
  timers: Split out forward timer base functionality
  timers: Clarify check in forward_timer_base()
  timers: Move store of next event into __next_timer_interrupt()
  timers: Do not IPI for deferrable timers
  tracing/timers: Add tracepoint for tracking timer base is_idle flag
  tracing/timers: Enhance timer_start tracepoint
  tick-sched: Warn when next tick seems to be in the past
  tick/sched: Cleanup confusing variables
  tick-sched: Fix function names in comments
  time: Make sysfs_get_uname() function visible in header
2024-01-08 18:44:11 -08:00
..
alarmtimer.c alarmtimer: Use maximum alarm time for suspend 2023-10-09 15:03:28 +02:00
clockevents.c clockevents: Repair kernel-doc for clockevent_delta2ns() 2022-12-01 13:35:41 +01:00
clocksource-wdtest.c clocksource: Make clocksource watchdog test safe for slow-HZ systems 2021-08-28 17:01:32 +02:00
clocksource.c clocksource: Handle negative skews in "skew is too large" messages 2023-07-14 15:17:09 -07:00
hrtimer.c hrtimers: Push pending hrtimers away from outgoing CPU earlier 2023-11-11 18:06:42 +01:00
itimer.c time: Prevent undefined behaviour in timespec64_to_ns() 2020-10-26 11:48:11 +01:00
jiffies.c clocksource: Make clocksource watchdog test safe for slow-HZ systems 2021-08-28 17:01:32 +02:00
Kconfig clocksource: Loosen clocksource watchdog constraints 2023-01-03 20:43:45 -08:00
Makefile time: Improve performance of time64_to_tm() 2021-06-24 11:51:59 +02:00
namespace.c vdso/timens: Refactor copy-pasted find_timens_vvar_page() helper into one copy 2022-12-01 11:35:40 +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-clock: introduce posix_clock_context concept 2023-10-15 20:07:52 +01:00
posix-cpu-timers.c posix-cpu-timers: Implement the missing timer_wait_running callback 2023-04-21 15:34:33 +02:00
posix-stubs.c posix-timers: Get rid of [COMPAT_]SYS_NI() uses 2023-12-20 21:30:27 -08:00
posix-timers.c posix-timers: Refer properly to CONFIG_HIGH_RES_TIMERS 2023-06-18 22:41:53 +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: Provide sched_clock_noinstr() 2023-06-05 21:11:04 +02:00
test_udelay.c time/debug: Fix memory leak with using debugfs_lookup() 2023-02-09 20:12:27 +01:00
tick-broadcast-hrtimer.c time/tick-broadcast: Remove RCU_NONIDLE() usage 2023-01-13 11:48:16 +01:00
tick-broadcast.c tick/broadcast: Make broadcast device replacement work correctly 2023-05-08 23:18:16 +02:00
tick-common.c tick/common: Align tick period during sched_timer setup 2023-06-16 20:45:28 +02:00
tick-internal.h time: Make sysfs_get_uname() function visible in header 2023-11-22 14:12:10 +01:00
tick-legacy.c timekeeping: remove xtime_update 2020-10-30 21:57:07 +01:00
tick-oneshot.c time: Fix various kernel-doc problems 2023-01-03 11:07:58 +01:00
tick-sched.c tick-sched: Warn when next tick seems to be in the past 2023-12-20 16:49:38 +01:00
tick-sched.h timers/nohz: Protect idle/iowait sleep time under seqcount 2023-04-18 16:35:12 +02:00
time_test.c kunit: time: Mark test as slow using test attributes 2023-07-26 13:29:35 -06:00
time.c time: add kernel-doc in time.c 2023-07-14 13:47:07 -06:00
timeconst.bc
timeconv.c time: Improve performance of time64_to_tm() 2021-06-24 11:51:59 +02:00
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 seqlock/latch: Provide raw_read_seqcount_latch_retry() 2023-06-05 21:11:03 +02:00
timekeeping.h asm-generic: cross-architecture timer cleanup 2020-12-16 00:07:17 -08:00
timer_list.c timer_list: Print name of per-cpu wakeup device 2021-05-31 17:04:49 +02:00
timer.c timers: Fix nextevt calculation when no timers are pending 2023-12-20 16:49:39 +01:00
vsyscall.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00