From 9213aa4784cf4e63e6d8d30ba71fd61c3d110247 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 24 Feb 2026 17:39:08 +0100 Subject: [PATCH] sched: Default enable HRTICK when deferred rearming is enabled The deferred rearm of the clock event device after an interrupt and and other hrtimer optimizations allow now to enable HRTICK for generic entry architectures. This decouples preemption from CONFIG_HZ, leaving only the periodic load-balancer and various accounting things relying on the tick. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Thomas Gleixner Signed-off-by: Peter Zijlstra (Intel) Link: https://patch.msgid.link/20260224163431.937531564@kernel.org --- kernel/sched/features.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/sched/features.h b/kernel/sched/features.h index 136a6584be79..d06228462607 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -63,8 +63,13 @@ SCHED_FEAT(DELAY_ZERO, true) */ SCHED_FEAT(WAKEUP_PREEMPTION, true) +#ifdef CONFIG_HRTIMER_REARM_DEFERRED +SCHED_FEAT(HRTICK, true) +SCHED_FEAT(HRTICK_DL, true) +#else SCHED_FEAT(HRTICK, false) SCHED_FEAT(HRTICK_DL, false) +#endif /* * Decrement CPU capacity based on time not spent running tasks