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Mon, 29 Sep 2025 02:22:29 -0700 (PDT) Received: from victus-lab ([193.205.81.5]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b3e89655b09sm181082366b.77.2025.09.29.02.22.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Sep 2025 02:22:28 -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 08/24] sched/deadline: Add dl_init_tg Date: Mon, 29 Sep 2025 11:22:05 +0200 Message-ID: <20250929092221.10947-9-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 Add dl_init_tg to initialize and/or update a rt-cgroup dl_server and to also account the allocated bandwidth. Co-developed-by: Alessio Balsini Signed-off-by: Alessio Balsini Co-developed-by: Andrea Parri Signed-off-by: Andrea Parri Co-developed-by: Yuri Andriaccio Signed-off-by: Yuri Andriaccio Signed-off-by: luca abeni --- kernel/sched/deadline.c | 33 +++++++++++++++++++++++++++++++++ kernel/sched/sched.h | 1 + 2 files changed, 34 insertions(+) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 5c8fe80b585..34a1494d782 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -340,6 +340,39 @@ void cancel_inactive_timer(struct sched_dl_entity *dl_= se) cancel_dl_timer(dl_se, &dl_se->inactive_timer); } =20 +#ifdef CONFIG_RT_GROUP_SCHED +void dl_init_tg(struct sched_dl_entity *dl_se, u64 rt_runtime, u64 rt_peri= od) +{ + struct rq *rq =3D container_of(dl_se->dl_rq, struct rq, dl); + int is_active; + u64 new_bw; + + raw_spin_rq_lock_irq(rq); + is_active =3D dl_se->my_q->rt.rt_nr_running > 0; + + update_rq_clock(rq); + dl_server_stop(dl_se); + + new_bw =3D to_ratio(dl_se->dl_period, dl_se->dl_runtime); + dl_rq_change_utilization(rq, dl_se, new_bw); + + dl_se->dl_runtime =3D rt_runtime; + dl_se->dl_deadline =3D rt_period; + dl_se->dl_period =3D rt_period; + + dl_se->runtime =3D 0; + dl_se->deadline =3D 0; + + dl_se->dl_bw =3D new_bw; + dl_se->dl_density =3D new_bw; + + if (is_active) + dl_server_start(dl_se); + + raw_spin_rq_unlock_irq(rq); +} +#endif + static void dl_change_utilization(struct task_struct *p, u64 new_bw) { WARN_ON_ONCE(p->dl.flags & SCHED_FLAG_SUGOV); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index d433abe1c9c..9853f321363 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -394,6 +394,7 @@ extern void dl_server_init(struct sched_dl_entity *dl_s= e, struct dl_rq *dl_rq, dl_server_has_tasks_f has_tasks, dl_server_pick_f pick_task); extern void sched_init_dl_servers(void); +extern void dl_init_tg(struct sched_dl_entity *dl_se, u64 rt_runtime, u64 = rt_period); =20 extern void dl_server_update_idle_time(struct rq *rq, struct task_struct *p); --=20 2.51.0