diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2012-02-11 06:05:00 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-02-10 16:17:13 +0100 |
| commit | 606dba2e289446600a0b68422ed2019af5355c12 (patch) | |
| tree | 286562f6ddcca34f3f029b68507b820f0c81b707 /kernel/sched/deadline.c | |
| parent | fed14d45f945042a15b09de48d7d3d58d9455fc4 (diff) | |
sched: Push put_prev_task() into pick_next_task()
In order to avoid having to do put/set on a whole cgroup hierarchy
when we context switch, push the put into pick_next_task() so that
both operations are in the same function. Further changes then allow
us to possibly optimize away redundant work.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1328936700.2476.17.camel@laptop
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/deadline.c')
| -rw-r--r-- | kernel/sched/deadline.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index b5700bceee5..50797d57608 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -990,7 +990,7 @@ static struct sched_dl_entity *pick_next_dl_entity(struct rq *rq, return rb_entry(left, struct sched_dl_entity, rb_node); } -struct task_struct *pick_next_task_dl(struct rq *rq) +struct task_struct *pick_next_task_dl(struct rq *rq, struct task_struct *prev) { struct sched_dl_entity *dl_se; struct task_struct *p; @@ -1001,6 +1001,9 @@ struct task_struct *pick_next_task_dl(struct rq *rq) if (unlikely(!dl_rq->dl_nr_running)) return NULL; + if (prev) + prev->sched_class->put_prev_task(rq, prev); + dl_se = pick_next_dl_entity(rq, dl_rq); BUG_ON(!dl_se); |