linux-kernel - [tip: sched/core] sched/deadline: Clear the defer params

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Message-ID: <177011752492.2495410.6564442211262872750.tip-bot2@tip-bot2>
Date: Tue, 03 Feb 2026 11:18:44 -0000
From: "tip-bot2 for Joel Fernandes" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Joel Fernandes <joelagnelf@...dia.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Andrea Righi <arighi@...dia.com>, Juri Lelli <juri.lelli@...hat.com>,
 Christian Loehle <christian.loehle@....com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched/deadline: Clear the defer params

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

Commit-ID:     3cb3b27693bf30defb16aa096158a3b24583b8d2
Gitweb:        https://git.kernel.org/tip/3cb3b27693bf30defb16aa096158a3b24583b8d2
Author:        Joel Fernandes <joelagnelf@...dia.com>
AuthorDate:    Mon, 26 Jan 2026 10:58:59 +01:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 03 Feb 2026 12:04:16 +01:00

sched/deadline: Clear the defer params

The defer params were not cleared in __dl_clear_params. Clear them.

Without this is some of my test cases are flaking and the DL timer is
not starting correctly AFAICS.

Fixes: a110a81c52a9 ("sched/deadline: Deferrable dl server")
Signed-off-by: Joel Fernandes <joelagnelf@...dia.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Andrea Righi <arighi@...dia.com>
Acked-by: Juri Lelli <juri.lelli@...hat.com>
Tested-by: Christian Loehle <christian.loehle@....com>
Link: https://patch.msgid.link/20260126100050.3854740-2-arighi@nvidia.com
---
 kernel/sched/deadline.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 82e7a21..7e181ec 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -3660,6 +3660,9 @@ static void __dl_clear_params(struct sched_dl_entity *dl_se)
 	dl_se->dl_non_contending	= 0;
 	dl_se->dl_overrun		= 0;
 	dl_se->dl_server		= 0;
+	dl_se->dl_defer			= 0;
+	dl_se->dl_defer_running		= 0;
+	dl_se->dl_defer_armed		= 0;
 
 #ifdef CONFIG_RT_MUTEXES
 	dl_se->pi_se			= dl_se;