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sched: Default enable HRTICK when deferred rearming is enabled

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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) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260224163431.937531564@kernel.org
This commit is contained in:
Peter Zijlstra
2026-02-24 17:39:08 +01:00
parent 343f2f4dc5
commit 9213aa4784
1 changed files with 5 additions and 0 deletions
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5
kernel/sched/features.h
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@@ -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