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linux/kernel/time
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Paul E. McKenney 15f8439833 hrtimer: Update hrtimer_resolution only if value changes 
Currently, the hrtimer_switch_to_hres() function unconditionally updates
hrtimer_resolution to HIGH_RES_NSEC.  This causes KCSAN false positives
in kernels built with CONFIG_KCSAN_STRICT=y.  It also causes unnecessary
cache-line traffic on the many code paths that load hrtimer_resolution,
which is especially regrettable because the value of hrtimer_resolution
normally changes only once during the lifetime of a given kernel.

Therefore, update the value of hrtimer_resolution to HIGH_RES_NSEC only
if it does not already have that value.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260919001428.3133388-10-paulmck@kernel.org
2026-09-29 21:02:52 +02:00
..
.kunitconfig time/kunit: Add .kunitconfig 2026-02-24 08:41:51 +01:00
alarmtimer.c alarmtimer: Remove stale return description from alarm_handle_timer() 2026-05-06 08:33:08 +02:00
clockevents.c tick/broadcast: Plug clockevents replacement race 2026-09-07 11:10:20 +02:00
clocksource-wdtest.c clocksource: Rewrite watchdog code completely 2026-03-20 13:36:32 +01:00
clocksource.c clocksource: Unregister subsystem on device registration failure 2026-07-07 23:26:58 +02:00
hrtimer.c hrtimer: Update hrtimer_resolution only if value changes 2026-09-29 21:02:52 +02:00
itimer.c timers/itimer: Zero-init old itimerval before copy to userspace 2026-08-11 15:43:12 +02:00
jiffies.c sysctl: remove CONFIG_PROC_SYSCTL, it just mirrors CONFIG_SYSCTL 2026-08-05 15:28:23 +02:00
Kconfig nohz: Replace dead select with choice default 2026-08-11 15:37:23 +02:00
Makefile timens: Remove dependency on the vDSO 2026-03-26 15:44:23 +01:00
namespace_internal.h timens: Remove dependency on the vDSO 2026-03-26 15:44:23 +01:00
namespace_vdso.c vdso/datastore: Explicitly prevent remote access to timens vvar page 2026-07-07 23:52:52 +02:00
namespace.c time/namespace: Validate nanosecond field in proc_timens_set_offset() 2026-07-07 23:26:58 +02:00
ntp_internal.h timekeeping: Drive time_offset skew via per-tick ntp_error transfer 2026-07-10 09:20:54 +02:00
ntp.c ntp: Remove tick_length_base, use tick_length directly 2026-07-10 09:20:55 +02:00
posix-clock.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
posix-cpu-timers.c posix-timers: Handle exit in do_exit() completely 2026-09-16 18:44:04 +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: Handle exit in do_exit() completely 2026-09-16 18:44:04 +02:00
posix-timers.h posix-timers: Handle exit in do_exit() completely 2026-09-16 18:44:04 +02:00
sched_clock.c time/sched_clock: Use ACCESS_PRIVATE() to evaluate hrtimer::function 2026-01-13 18:08:57 +01:00
sleep_timeout.c timers: Use accessor for hrtimer_sleeper ->task field in sleep_timeout.c 2026-09-29 21:02:52 +02:00
test_udelay.c time: Add MODULE_DESCRIPTION() to time test modules 2024-06-03 11:18:50 +02:00
tick-broadcast-hrtimer.c clockevents: Remove redundant CLOCK_EVT_FEAT_KTIME 2026-02-27 16:40:06 +01:00
tick-broadcast.c tick/broadcast: Plug clockevents replacement race 2026-09-07 11:10:20 +02:00
tick-common.c clockevents: Prevent timer interrupt starvation 2026-04-10 22:45:38 +02:00
tick-internal.h tick/broadcast: Plug clockevents replacement race 2026-09-07 11:10:20 +02:00
tick-legacy.c
tick-oneshot.c treewide: Update email address 2026-01-11 06:09:11 -10:00
tick-sched.c tick: Remove arch_needs_cpu 2026-07-08 17:03:28 +02:00
tick-sched.h tick/sched: Remove unused fields 2026-06-02 21:27:25 +02:00
time_test.c time/kunit: Document handling of negative years of is_leap() 2026-02-02 12:37:54 +01:00
time.c VDSO updates: 2026-08-18 16:56:25 -07:00
timeconst.bc
timeconv.c
timecounter.c time/timecounter: Inline timecounter_cyc2time() 2025-12-15 20:16:49 +01:00
timekeeping_debug.c timekeeping: Add percpu counter for tracking floor swap events 2024-10-10 10:20:46 +02:00
timekeeping_internal.h timekeeping: Move the vDSO update declarations into a private header 2026-07-07 23:48:08 +02:00
timekeeping.c timekeeping: Use u32 for clock_was_set_seq 2026-08-11 18:11:20 +02:00
timekeeping.h timekeeping: Use u32 for clock_was_set_seq 2026-08-11 18:11:20 +02:00
timer_list.c timer_list: Use ktime_t over nanoseconds 2026-08-11 18:11:20 +02:00
timer_migration.c timers/migration: Fix memory leak in tmigr_setup_groups() error path 2026-07-07 23:26:58 +02:00
timer_migration.h timers/migration: Fix bad line kernel-doc warning in struct tmigr_cpu 2026-07-20 16:07:39 +02:00
timer.c timer: Keep debugobjects state consistent in migrate_timer_list() 2026-08-18 10:51:43 +02:00
vsyscall.c vdso/vsyscall: Avoid slow division loop in auxiliary clock update 2025-09-03 11:55:11 +02:00