[tip: sched/core] sched: Update time before requeueing delayed entities

[tip-bot2 for Vincent Guittot]

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

Commit-ID:     333238da9a193ffc58792995f3e951e4cb87bfd2
Gitweb:        https://git.kernel.org/tip/333238da9a193ffc58792995f3e951e4cb87bfd2
Author:        Vincent Guittot <vincent.guittot@xxxxxxxxxx>
AuthorDate:    Fri, 14 Aug 2026 15:52:41 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 14 Aug 2026 16:12:55 +02:00

sched: Update time before requeueing delayed entities

In order to compute the right lag, it is required to update time to 'now'.
Without this, the delayed entity might appear younger than it really is and
receive less compensation for having waited.

Signed-off-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
 kernel/sched/fair.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d78467e..f15f576 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7779,6 +7779,8 @@ requeue_delayed_entity(struct sched_entity *se)
 	WARN_ON_ONCE(!se->sched_delayed);
 	WARN_ON_ONCE(!se->on_rq);
 
+	update_curr(cfs_rq);
+
 	if (update_entity_lag(cfs_rq, se)) {
 		cfs_rq->nr_queued--;
 		if (se != cfs_rq->curr)