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Thu, 30 Apr 2026 14:38:56 -0700 (PDT) Received: from yuri-framework13 ([78.211.51.156]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-44a9879ef89sm418510f8f.30.2026.04.30.14.38.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Apr 2026 14:38:56 -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 v5 10/29] sched/deadline: Add dl_init_tg Date: Thu, 30 Apr 2026 23:38:14 +0200 Message-ID: <20260430213835.62217-11-yurand2000@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260430213835.62217-1-yurand2000@gmail.com> References: <20260430213835.62217-1-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: 8bit From: luca abeni Add dl_init_tg to initialize and/or update a rt-cgroup dl_server and to also account the allocated bandwidth. This function is currently unhooked and will be later used to allocate bandwidth to rt-cgroups. Add lock guard for raw_spin_rq_lock_irq for cleaner code. 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 | 31 +++++++++++++++++++++++++++++++ kernel/sched/sched.h | 5 +++++ 2 files changed, 36 insertions(+) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 7c039d5f3c5d..5532ca4ad969 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -332,6 +332,37 @@ void cancel_inactive_timer(struct sched_dl_entity *dl_se) cancel_dl_timer(dl_se, &dl_se->inactive_timer); } +#ifdef CONFIG_RT_GROUP_SCHED +void dl_init_tg(struct sched_dl_entity *dl_se, u64 rt_runtime, u64 rt_period) +{ + struct rq *rq = container_of_const(dl_se->dl_rq, struct rq, dl); + int is_active; + u64 new_bw; + + guard(raw_spin_rq_lock_irq)(rq); + is_active = dl_se->my_q->rt.rt_nr_running > 0; + + update_rq_clock(rq); + dl_server_stop(dl_se); + + new_bw = to_ratio(rt_period, rt_runtime); + dl_rq_change_utilization(rq, dl_se, new_bw); + + dl_se->dl_runtime = rt_runtime; + dl_se->dl_deadline = rt_period; + dl_se->dl_period = rt_period; + + dl_se->runtime = 0; + dl_se->deadline = 0; + + dl_se->dl_bw = new_bw; + dl_se->dl_density = new_bw; + + if (is_active) + dl_server_start(dl_se); +} +#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 e7e263d3cddb..ca69d2132061 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -423,6 +423,7 @@ extern void dl_server_init(struct sched_dl_entity *dl_se, struct dl_rq *dl_rq, struct rq *served_rq, 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); extern void fair_server_init(struct rq *rq); extern void ext_server_init(struct rq *rq); @@ -2023,6 +2024,10 @@ static inline struct rq *_this_rq_lock_irq(struct rq_flags *rf) __acquires_ret return rq; } +DEFINE_LOCK_GUARD_1(raw_spin_rq_lock_irq, struct rq, + raw_spin_rq_lock_irq(_T->lock), + raw_spin_rq_unlock_irq(_T->lock)) + #ifdef CONFIG_NUMA enum numa_topology_type { -- 2.53.0