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Sat, 15 Aug 2026 20:26:48 -0700 (PDT) From: Liang Hao To: Ingo Molnar , Peter Zijlstra , Juri Lelli Cc: Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , linux-kernel@vger.kernel.org, Liang Hao Subject: [PATCH] sched/deadline: check start_dl_timer expiry with ktime_before() Date: Sun, 16 Aug 2026 11:26:43 +0800 Message-ID: <20260816032643.44969-1-haohlliang@gmail.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace ktime_us_delta() < 0 with ktime_before() so the past-expiry test uses the same resolution as act/now. Signed-off-by: Liang Hao --- kernel/sched/deadline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index c3e38d4f3365..e6b69140ae1a 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1097,7 +1097,7 @@ static int start_dl_timer(struct sched_dl_entity *dl_se) * chosen as the deadline is too small, don't even try to * start the timer in the past! */ - if (ktime_us_delta(act, now) < 0) + if (ktime_before(act, now)) return 0; /* -- 2.50.1 (Apple Git-155)