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([2a01:e0a:f:6020:4665:605c:241e:71fc]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488fb74eed9sm31548505e9.1.2026.04.17.10.16.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Apr 2026 10:16:46 -0700 (PDT) From: Vincent Guittot To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, kprateek.nayak@amd.com, linux-kernel@vger.kernel.org, shubhang@os.amperecomputing.com Cc: Vincent Guittot Subject: [PATCH] sched/eevdf: fix update negative lag Date: Fri, 17 Apr 2026 19:16:42 +0200 Message-ID: <20260417171642.3539914-1-vincent.guittot@linaro.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" update_entity_lag() should return true when the se->vlag is changed during the update. Fixes: 059258b0d424 ("sched/fair: Prevent negative lag increase during dela= yed dequeue") Signed-off-by: Vincent Guittot --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index f179faf7a6a1..d3d858a9f700 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -863,7 +863,7 @@ bool update_entity_lag(struct cfs_rq *cfs_rq, struct sc= hed_entity *se) if (sched_feat(DELAY_ZERO)) vlag =3D min(vlag, 0); } - ret =3D (vlag =3D=3D se->vlag); + ret =3D (vlag !=3D se->vlag); se->vlag =3D vlag; =20 return ret; --=20 2.43.0