diff options
| author | Vincent Guittot <vincent.guittot@linaro.org> | 2024-12-02 18:46:05 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-12-09 11:48:13 +0100 |
| commit | 61b82dfb6b7e1f951fd1e95198a2aee2ccf6a167 (patch) | |
| tree | 2cf0fa8f0c773e22553c3be3c41d9f67890f330e /kernel/sched | |
| parent | 736c55a02c477ad31c57ae4c69130f437855e051 (diff) | |
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@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lore.kernel.org/r/20241202174606.4074512-11-vincent.guittot@linaro.org
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/fair.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 84c0191a8ffa..2aa1d0cb6821 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -9391,11 +9391,15 @@ 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 unless we migrate load, 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) && (env->migration_type != migrate_load)) + return 0; + if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu)) return 0; |