[tip: sched/core] sched/deadline: Fix replenishment logic for non-deferred servers

[tip-bot2 for Yuri Andriaccio]

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

Commit-ID:     eecd5e117cfa63a353f4c69fdcea5d9b14af698e
Gitweb:        https://git.kernel.org/tip/eecd5e117cfa63a353f4c69fdcea5d9b14af698e
Author:        Yuri Andriaccio <yurand2000@xxxxxxxxx>
AuthorDate:    Thu, 30 Apr 2026 23:38:05 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Tue, 19 May 2026 12:17:35 +02:00

sched/deadline: Fix replenishment logic for non-deferred servers

Enqueue and replenish non-deferred deadline servers when their runtime is
exhausted and the replenishment timer could not be started because it is
too close to the wake-up instant.

Signed-off-by: Yuri Andriaccio <yurand2000@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://patch.msgid.link/20260430213835.62217-2-yurand2000@xxxxxxxxx
---
 kernel/sched/deadline.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index edca784..b60e2df 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1515,8 +1515,12 @@ throttle:
 
 		if (unlikely(is_dl_boosted(dl_se) || !start_dl_timer(dl_se))) {
 			if (dl_server(dl_se)) {
-				replenish_dl_new_period(dl_se, rq);
-				start_dl_timer(dl_se);
+				if (dl_se->dl_defer) {
+					replenish_dl_new_period(dl_se, rq);
+					start_dl_timer(dl_se);
+				} else {
+					enqueue_dl_entity(dl_se, ENQUEUE_REPLENISH);
+				}
 			} else {
 				enqueue_task_dl(rq, dl_task_of(dl_se), ENQUEUE_REPLENISH);
 			}