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Message-ID: <20241128092750.2541735-8-vincent.guittot@linaro.org> Date: Thu, 28 Nov 2024 10:27:48 +0100 From: Vincent Guittot <vincent.guittot@...aro.org> To: mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com, dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de, vschneid@...hat.com, linux-kernel@...r.kernel.org Cc: kprateek.nayak@....com, pauld@...hat.com, efault@....de, luis.machado@....com, Vincent Guittot <vincent.guittot@...aro.org> Subject: [PATCH 7/9] sched/fair: Do not try to migrate delayed dequeue task Migrating a delayed dequeued task doesn't help in balancing the number of runnable tasks in the system. Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org> --- kernel/sched/fair.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 1b4f1b610543..9d80f3a61082 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -9405,11 +9405,15 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env) /* * We do not migrate tasks that are: - * 1) throttled_lb_pair, or - * 2) cannot be migrated to this CPU due to cpus_ptr, or - * 3) running (obviously), or - * 4) are cache-hot on their current CPU. + * 1) delayed dequeued, or + * 2) throttled_lb_pair, or + * 3) cannot be migrated to this CPU due to cpus_ptr, or + * 4) running (obviously), or + * 5) are cache-hot on their current CPU. */ + if (p->se.sched_delayed) + return 0; + if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu)) return 0; -- 2.43.0
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