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Mon, 09 Nov 2026 08:36:58 -0800 (PST) Received: from victus-lab ([193.205.81.5]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b96cd012e1sm138851295e9.8.2026.11.09.08.36.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 08:36:58 -0800 (PST) From: Yuri Andriaccio To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Tejun Heo , Johannes Weiner , =?UTF-8?q?Michal=20Koutn=C3=BD?= Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Luca Abeni , Yuri Andriaccio Subject: [RFC PATCH v7 23/29] sched/core: Execute enqueued balance callbacks after migrate_disable_switch Date: Mon, 9 Nov 2026 17:36:09 +0100 Message-ID: <20261109163616.195264-24-yurand2000@gmail.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261109163616.195264-1-yurand2000@gmail.com> References: <20261109163616.195264-1-yurand2000@gmail.com> X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Execute balance callbacks after migrate_disable_switch. Balancing may be requested on the __schedule path, in migrate_disable_switch, when the running task is throttled and then pushed away from its runqueue. Signed-off-by: Yuri Andriaccio --- kernel/sched/core.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index aef019cef859..e4e50202896d 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2470,6 +2470,9 @@ do_set_cpus_allowed(struct task_struct *p, struct affinity_context *ctx); static void migrate_disable_switch(struct rq *rq, struct task_struct *p) { + struct rq_flags rf; + struct balance_callback *head; + struct affinity_context ac = { .new_mask = cpumask_of(rq->cpu), .flags = SCA_MIGRATE_DISABLE, @@ -2481,8 +2484,13 @@ static void migrate_disable_switch(struct rq *rq, struct task_struct *p) if (p->cpus_ptr != &p->cpus_mask) return; - scoped_guard (task_rq_lock, p) - do_set_cpus_allowed(p, &ac); + rq = task_rq_lock(p, &rf); + + do_set_cpus_allowed(p, &ac); + + head = splice_balance_callbacks(rq); + task_rq_unlock(rq, p, &rf); + balance_callbacks(rq, head); } void ___migrate_enable(void) -- 2.56.0