[tip: sched/hrtick] sched/fair: Make hrtick resched hard

[tip-bot2 for Peter Zijlstra (Intel)]

The following commit has been merged into the sched/hrtick branch of tip:

Commit-ID:     5d88e424ec1b3ea7f552bd14d932f510146c45c7
Gitweb:        https://git.kernel.org/tip/5d88e424ec1b3ea7f552bd14d932f510146c45c7
Author:        Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
AuthorDate:    Tue, 24 Feb 2026 17:35:27 +01:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 27 Feb 2026 16:40:04 +01:00

sched/fair: Make hrtick resched hard

Since the tick causes hard preemption, the hrtick should too.

Letting the hrtick do lazy preemption completely defeats the purpose, since
it will then still be delayed until a old tick and be dependent on
CONFIG_HZ.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://patch.msgid.link/20260224163428.933894105@xxxxxxxxxx
---
 kernel/sched/fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 0b6ce88..e9e5fe4 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5530,7 +5530,7 @@ entity_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr, int queued)
 	 * validating it and just reschedule.
 	 */
 	if (queued) {
-		resched_curr_lazy(rq_of(cfs_rq));
+		resched_curr(rq_of(cfs_rq));
 		return;
 	}
 #endif