diff --git a/include/linux/sched.h b/include/linux/sched.h index d7cc77181ef9..48639b0c75d0 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -554,6 +554,7 @@ struct sched_statistics { u64 nr_failed_migrations_running; u64 nr_failed_migrations_hot; u64 nr_forced_migrations; + u64 nr_migrations_cpu_non_preferred; u64 nr_wakeups; u64 nr_wakeups_sync; diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 0e40055c2367..0bb86a43a592 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -11288,8 +11288,13 @@ static int sched_non_preferred_cpu_push_stop(void *arg) update_rq_clock(rq); context_unsafe_alias(rq); - if (task_rq(p) == rq && task_on_rq_queued(p)) - rq = __migrate_task(rq, &rf, p, cpu); + if (task_rq(p) == rq && task_on_rq_queued(p)) { + struct rq *dest_rq = __migrate_task(rq, &rf, p, cpu); + + if (rq != dest_rq) + schedstat_inc(p->stats.nr_migrations_cpu_non_preferred); + rq = dest_rq; + } rq_unlock(rq, &rf); } diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index fda10b3fa249..e6a3b516c703 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -1440,6 +1440,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns, P_SCHEDSTAT(nr_failed_migrations_running); P_SCHEDSTAT(nr_failed_migrations_hot); P_SCHEDSTAT(nr_forced_migrations); + P_SCHEDSTAT(nr_migrations_cpu_non_preferred); P_SCHEDSTAT(nr_wakeups); P_SCHEDSTAT(nr_wakeups_sync); P_SCHEDSTAT(nr_wakeups_migrate);