diff options
| author |   Peter Zijlstra <peterz@infradead.org> | 2017-02-21 14:47:02 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2017-03-16 09:46:25 +0100 |
| commit | 7a57f32a4d5c80c7790929dd7f4441bb6bff7480 (patch) | |
| tree | ccbfc5153107ba27567abe47cb89e3287fa7c472 /kernel/sched | |
| parent | sched/core: Simplify update_rq_clock() in __schedule() (diff) | |
| download | linux-dev-7a57f32a4d5c80c7790929dd7f4441bb6bff7480.tar.xz linux-dev-7a57f32a4d5c80c7790929dd7f4441bb6bff7480.zip | |
sched/core: Avoid obvious double update_rq_clock()
Add DEQUEUE_NOCLOCK to all places where we just did an
update_rq_clock() already.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
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 | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 179a6c928bf1..c6be770d6e68 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1062,7 +1062,7 @@ void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) * holding rq->lock. */ lockdep_assert_held(&rq->lock); - dequeue_task(rq, p, DEQUEUE_SAVE); + dequeue_task(rq, p, DEQUEUE_SAVE | DEQUEUE_NOCLOCK); } if (running) put_prev_task(rq, p); @@ -2555,7 +2555,7 @@ void wake_up_new_task(struct task_struct *p) update_rq_clock(rq); post_init_entity_util_avg(&p->se); - activate_task(rq, p, 0); + 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); @@ -3683,7 +3683,8 @@ EXPORT_SYMBOL(default_wake_function); */ void rt_mutex_setprio(struct task_struct *p, int prio) { - int oldprio, queued, running, queue_flag = DEQUEUE_SAVE | DEQUEUE_MOVE; + int oldprio, queued, running, queue_flag = + DEQUEUE_SAVE | DEQUEUE_MOVE | DEQUEUE_NOCLOCK; const struct sched_class *prev_class; struct rq_flags rf; struct rq *rq; @@ -3804,7 +3805,7 @@ void set_user_nice(struct task_struct *p, long nice) queued = task_on_rq_queued(p); running = task_current(rq, p); if (queued) - dequeue_task(rq, p, DEQUEUE_SAVE); + dequeue_task(rq, p, DEQUEUE_SAVE | DEQUEUE_NOCLOCK); if (running) put_prev_task(rq, p); @@ -4125,7 +4126,7 @@ static int __sched_setscheduler(struct task_struct *p, const struct sched_class *prev_class; struct rq_flags rf; int reset_on_fork; - int queue_flags = DEQUEUE_SAVE | DEQUEUE_MOVE; + int queue_flags = DEQUEUE_SAVE | DEQUEUE_MOVE | DEQUEUE_NOCLOCK; struct rq *rq; /* May grab non-irq protected spin_locks: */ @@ -6413,7 +6414,8 @@ static void sched_change_group(struct task_struct *tsk, int type) */ void sched_move_task(struct task_struct *tsk) { - int queued, running; + int queued, running, queue_flags = + DEQUEUE_SAVE | DEQUEUE_MOVE | DEQUEUE_NOCLOCK; struct rq_flags rf; struct rq *rq; @@ -6424,14 +6426,14 @@ void sched_move_task(struct task_struct *tsk) queued = task_on_rq_queued(tsk); if (queued) - dequeue_task(rq, tsk, DEQUEUE_SAVE | DEQUEUE_MOVE); + dequeue_task(rq, tsk, queue_flags); if (running) put_prev_task(rq, tsk); sched_change_group(tsk, TASK_MOVE_GROUP); if (queued) - enqueue_task(rq, tsk, ENQUEUE_RESTORE | ENQUEUE_MOVE | ENQUEUE_NOCLOCK); + enqueue_task(rq, tsk, queue_flags); if (running) set_curr_task(rq, tsk); |