From: Yuri Andriaccio <yurand2000@gmail.com>
Date: Thu, 30 Apr 2026 21:38:05 +0000 (+0200)
Subject: sched/deadline: Fix replenishment logic for non-deferred servers
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eecd5e117cfa63a353f4c69fdcea5d9b14af698e;p=thirdparty%2Fkernel%2Flinux.git

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@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260430213835.62217-2-yurand2000@gmail.com
---

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index edca7849b165d..b60e2df8ff9da 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);
 			}