diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2019-04-09 09:59:05 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-04-16 16:55:17 +0200 |
| commit | 7dd7788411646c9619aa6495f832bc0a9b0146b5 (patch) | |
| tree | f5d8616364b40b4195b4e33439ef8b29c6710e64 /kernel/sched | |
| parent | sched/core: Remove ttwu_activate() (diff) | |
| download | linux-7dd7788411646c9619aa6495f832bc0a9b0146b5.tar.xz linux-7dd7788411646c9619aa6495f832bc0a9b0146b5.zip | |
sched/core: Unify p->on_rq updates
Almost all {,de}activate_task() invocations pair with p->on_rq
updates, the exception being the usage in rt/deadline which hold both
rq locks and therefore don't strictly need to set
TASK_ON_RQ_MIGRATING, but it is harmless if we do anyway.
Put the updates in {,de}activate_task() and cut down on repetition.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 9 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 2 |
2 files changed, 4 insertions, 7 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 3feb83df322e..f4838b78b9f9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -792,10 +792,14 @@ void activate_task(struct rq *rq, struct task_struct *p, int flags) rq->nr_uninterruptible--; enqueue_task(rq, p, flags); + + p->on_rq = TASK_ON_RQ_QUEUED; } void deactivate_task(struct rq *rq, struct task_struct *p, int flags) { + p->on_rq = (flags & DEQUEUE_SLEEP) ? 0 : TASK_ON_RQ_MIGRATING; + if (task_contributes_to_load(p)) rq->nr_uninterruptible++; @@ -1237,11 +1241,9 @@ static void __migrate_swap_task(struct task_struct *p, int cpu) rq_pin_lock(src_rq, &srf); rq_pin_lock(dst_rq, &drf); - p->on_rq = TASK_ON_RQ_MIGRATING; deactivate_task(src_rq, p, 0); set_task_cpu(p, cpu); activate_task(dst_rq, p, 0); - p->on_rq = TASK_ON_RQ_QUEUED; check_preempt_curr(dst_rq, p, 0); rq_unpin_lock(dst_rq, &drf); @@ -1733,7 +1735,6 @@ ttwu_do_activate(struct rq *rq, struct task_struct *p, int wake_flags, #endif activate_task(rq, p, en_flags); - p->on_rq = TASK_ON_RQ_QUEUED; ttwu_do_wakeup(rq, p, wake_flags, rf); } @@ -2408,7 +2409,6 @@ void wake_up_new_task(struct task_struct *p) post_init_entity_util_avg(p); activate_task(rq, p, ENQUEUE_NOCLOCK); - p->on_rq = TASK_ON_RQ_QUEUED; trace_sched_wakeup_new(p); check_preempt_curr(rq, p, WF_FORK); #ifdef CONFIG_SMP @@ -3407,7 +3407,6 @@ static void __sched notrace __schedule(bool preempt) prev->state = TASK_RUNNING; } else { deactivate_task(rq, prev, DEQUEUE_SLEEP | DEQUEUE_NOCLOCK); - prev->on_rq = 0; if (prev->in_iowait) { atomic_inc(&rq->nr_iowait); diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index b6cc0703b850..e5b100b6ba4e 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7491,7 +7491,6 @@ static void detach_task(struct task_struct *p, struct lb_env *env) { lockdep_assert_held(&env->src_rq->lock); - p->on_rq = TASK_ON_RQ_MIGRATING; deactivate_task(env->src_rq, p, DEQUEUE_NOCLOCK); set_task_cpu(p, env->dst_cpu); } @@ -7627,7 +7626,6 @@ static void attach_task(struct rq *rq, struct task_struct *p) BUG_ON(task_rq(p) != rq); activate_task(rq, p, ENQUEUE_NOCLOCK); - p->on_rq = TASK_ON_RQ_QUEUED; check_preempt_curr(rq, p, 0); } |