diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2012-02-11 09:05:00 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-02-10 19:17:13 +0400 |
| commit | 606dba2e289446600a0b68422ed2019af5355c12 (patch) | |
| tree | 286562f6ddcca34f3f029b68507b820f0c81b707 /kernel/sched/fair.c | |
| parent | fed14d45f945042a15b09de48d7d3d58d9455fc4 (diff) | |
| download | linux-606dba2e289446600a0b68422ed2019af5355c12.tar.xz | |
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/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 748a7ac3388f..c4bb0ac26a7c 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4655,7 +4655,8 @@ preempt: set_last_buddy(se); } -static struct task_struct *pick_next_task_fair(struct rq *rq) +static struct task_struct * +pick_next_task_fair(struct rq *rq, struct task_struct *prev) { struct task_struct *p; struct cfs_rq *cfs_rq = &rq->cfs; @@ -4664,6 +4665,9 @@ static struct task_struct *pick_next_task_fair(struct rq *rq) if (!cfs_rq->nr_running) return NULL; + if (prev) + prev->sched_class->put_prev_task(rq, prev); + do { se = pick_next_entity(cfs_rq); set_next_entity(cfs_rq, se); |