Thomas Gleixner 343f2f4dc5 hrtimer: Try to modify timers in place ... When modifying the expiry of a armed timer it is first dequeued, then the expiry value is updated and then it is queued again. This can be avoided when the new expiry value is within the range of the previous and the next timer as that does not change the position in the RB tree. The linked timerqueue allows to peak ahead to the neighbours and check whether the new expiry time is within the range of the previous and next timer. If so just modify the timer in place and spare the enqueue and requeue effort, which might end up rotating the RB tree twice for nothing. This speeds up the handling of frequently rearmed hrtimers, like the hrtick scheduler timer significantly. Signed-off-by: Thomas Gleixner <tglx@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://patch.msgid.link/20260224163431.873359816@kernel.org		2026-02-27 16:40:17 +01:00
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alarmtimer.c	time: Fix spelling mistakes in comments	2025-09-21 10:02:02 +02:00
clockevents.c	clockevents: Provide support for clocksource coupled comparators	2026-02-27 16:40:08 +01:00
clocksource-wdtest.c	clocksource/wdtest: Print time values for short udelay(1)	2025-01-15 19:49:13 +01:00
clocksource.c	clocksource: Reduce watchdog readout delay limit to prevent false positives	2026-01-21 11:33:11 +01:00
hrtimer.c	hrtimer: Try to modify timers in place	2026-02-27 16:40:17 +01:00
itimer.c	timers/itimer: Avoid direct access to hrtimer clockbase	2025-09-09 12:27:17 +02:00
jiffies.c	sysctl: replace SYSCTL_INT_CONV_CUSTOM macro with functions	2026-01-06 11:27:10 +01:00
Kconfig	hrtimer: Push reprogramming timers into the interrupt return path	2026-02-27 16:40:14 +01:00
Makefile	time: Build generic update_vsyscall() only with generic time vDSO	2025-09-04 11:23:50 +02:00
namespace.c	treewide: Replace kmalloc with kmalloc_obj for non-scalar types	2026-02-21 01:02:28 -08:00
ntp_internal.h	ntp: Rename __do_adjtimex() to ntp_adjtimex()	2025-06-19 14:28:23 +02:00
ntp.c	ntp: Use ktime_get_ntp_seconds()	2025-06-19 14:28:24 +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	hrtimer: Store time as ktime_t in restart block	2025-11-14 16:31:19 +01:00
posix-stubs.c	posix-timers: Get rid of [COMPAT_]SYS_NI() uses	2023-12-20 21:30:27 -08:00
posix-timers.c	compiler-context-analysis: Remove __cond_lock() function-like helper	2026-01-05 16:43:33 +01:00
posix-timers.h	timekeeping: Add minimal posix-timers support for auxiliary clocks	2025-06-27 20:13:12 +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	treewide, timers: Rename from_timer() to timer_container_of()	2025-06-08 09:07:37 +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	treewide: Update email address	2026-01-11 06:09:11 -10:00
tick-common.c	treewide: Update email address	2026-01-11 06:09:11 -10:00
tick-internal.h	cpufreq: ondemand: Simplify idle cputime granularity test	2026-01-28 22:24:58 +01:00
tick-legacy.c	timekeeping: remove xtime_update	2020-10-30 21:57:07 +01:00
tick-oneshot.c	treewide: Update email address	2026-01-11 06:09:11 -10:00
tick-sched.c	tick/sched: Avoid hrtimer_cancel/start() sequence	2026-02-27 16:40:06 +01:00
tick-sched.h	tick/sched: Fix struct tick_sched doc warnings	2024-04-01 10:36:35 +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	time: export timespec64_add_safe() symbol	2025-09-03 16:51:08 -07:00
timeconst.bc	time: Add SPDX license identifiers	2018-11-23 11:51:20 +01:00
timeconv.c	time: Improve performance of time64_to_tm()	2021-06-24 11:51:59 +02:00
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: Provide ktime_get_ntp_seconds()	2025-06-19 14:28:23 +02:00
timekeeping.c	timekeeping: Provide infrastructure for coupled clockevents	2026-02-27 16:40:08 +01:00
timekeeping.h	timekeeping: Provide infrastructure for coupled clockevents	2026-02-27 16:40:08 +01:00
timer_list.c	hrtimer: Use linked timerqueue	2026-02-27 16:40:16 +01:00
timer_migration.c	Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses	2026-02-22 08:26:33 -08:00
timer_migration.h	timers/migration: Rename 'online' bit to 'available'	2025-11-20 20:17:31 +01:00
timer.c	cpufreq: ondemand: Simplify idle cputime granularity test	2026-01-28 22:24:58 +01:00
vsyscall.c	vdso/vsyscall: Avoid slow division loop in auxiliary clock update	2025-09-03 11:55:11 +02:00