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Mon, 29 Sep 2025 02:22:24 -0700 (PDT) Received: from victus-lab ([193.205.81.5]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b3e89655b09sm181082366b.77.2025.09.29.02.22.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Sep 2025 02:22:24 -0700 (PDT) From: Yuri Andriaccio To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider Cc: linux-kernel@vger.kernel.org, Luca Abeni , Yuri Andriaccio Subject: [RFC PATCH v3 02/24] sched/deadline: Distinct between dl_rq and my_q Date: Mon, 29 Sep 2025 11:21:59 +0200 Message-ID: <20250929092221.10947-3-yurand2000@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250929092221.10947-1-yurand2000@gmail.com> References: <20250929092221.10947-1-yurand2000@gmail.com> 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" From: luca abeni Create two fields for runqueues in sched_dl_entity to make a distinction be= tween the global runqueue and the runqueue which the dl_server serves. Signed-off-by: luca abeni Signed-off-by: Yuri Andriaccio --- include/linux/sched.h | 6 ++++-- kernel/sched/deadline.c | 11 +++++++---- kernel/sched/fair.c | 6 +++--- kernel/sched/sched.h | 3 ++- 4 files changed, 16 insertions(+), 10 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index f8188b83335..5022ff99c5d 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -727,12 +727,14 @@ struct sched_dl_entity { * Bits for DL-server functionality. Also see the comment near * dl_server_update(). * - * @rq the runqueue this server is for + * @dl_rq the runqueue on which this entity is (to be) queued + * @my_q the runqueue "owned" by this entity * * @server_has_tasks() returns true if @server_pick return a * runnable task. */ - struct rq *rq; + struct dl_rq *dl_rq; + struct rq *my_q; dl_server_has_tasks_f server_has_tasks; dl_server_pick_f server_pick_task; =20 diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 5113c3a2633..6ff00f71041 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -75,11 +75,12 @@ static inline struct rq *rq_of_dl_rq(struct dl_rq *dl_r= q) =20 static inline struct rq *rq_of_dl_se(struct sched_dl_entity *dl_se) { - struct rq *rq =3D dl_se->rq; + struct rq *rq; =20 if (!dl_server(dl_se)) rq =3D task_rq(dl_task_of(dl_se)); - + else + rq =3D container_of(dl_se->dl_rq, struct rq, dl); return rq; } =20 @@ -1625,11 +1626,13 @@ static bool dl_server_stopped(struct sched_dl_entit= y *dl_se) return false; } =20 -void dl_server_init(struct sched_dl_entity *dl_se, struct rq *rq, +void dl_server_init(struct sched_dl_entity *dl_se, struct dl_rq *dl_rq, + struct rq *served_rq, dl_server_has_tasks_f has_tasks, dl_server_pick_f pick_task) { - dl_se->rq =3D rq; + dl_se->dl_rq =3D dl_rq; + dl_se->my_q =3D served_rq; dl_se->server_has_tasks =3D has_tasks; dl_se->server_pick_task =3D pick_task; } diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index b173a059315..2723086538b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -8861,12 +8861,12 @@ static struct task_struct *__pick_next_task_fair(st= ruct rq *rq, struct task_stru =20 static bool fair_server_has_tasks(struct sched_dl_entity *dl_se) { - return !!dl_se->rq->cfs.nr_queued; + return !!dl_se->my_q->cfs.nr_queued; } =20 static struct task_struct *fair_server_pick_task(struct sched_dl_entity *d= l_se) { - return pick_task_fair(dl_se->rq); + return pick_task_fair(dl_se->my_q); } =20 void fair_server_init(struct rq *rq) @@ -8875,7 +8875,7 @@ void fair_server_init(struct rq *rq) =20 init_dl_entity(dl_se); =20 - dl_server_init(dl_se, rq, fair_server_has_tasks, fair_server_pick_task); + dl_server_init(dl_se, &rq->dl, rq, fair_server_has_tasks, fair_server_pic= k_task); } =20 /* diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index be9745d104f..2499b36a3c5 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -382,7 +382,8 @@ extern s64 dl_scaled_delta_exec(struct rq *rq, struct s= ched_dl_entity *dl_se, s6 extern void dl_server_update(struct sched_dl_entity *dl_se, s64 delta_exec= ); extern void dl_server_start(struct sched_dl_entity *dl_se); extern void dl_server_stop(struct sched_dl_entity *dl_se); -extern void dl_server_init(struct sched_dl_entity *dl_se, struct rq *rq, +extern void dl_server_init(struct sched_dl_entity *dl_se, struct dl_rq *dl= _rq, + struct rq *served_rq, dl_server_has_tasks_f has_tasks, dl_server_pick_f pick_task); extern void sched_init_dl_servers(void); --=20 2.51.0