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| author | Peter Zijlstra <peterz@infradead.org> | 2015-06-11 15:46:37 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-06-19 01:25:26 +0300 |
| commit | e3fca9e7cbfb72694a21c886fcdf9f059cfded9c (patch) | |
| tree | 59d47a653d9c86b7537810344c6d5d7702785fe1 /kernel/sched/rt.c | |
| parent | 624bbdfac99c50bf03dff9a0023f666b8e965627 (diff) | |
| download | linux-e3fca9e7cbfb72694a21c886fcdf9f059cfded9c.tar.xz | |
sched: Replace post_schedule with a balance callback list
Generalize the post_schedule() stuff into a balance callback list.
This allows us to more easily use it outside of schedule() and cross
sched_class.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: ktkhai@parallels.com
Cc: rostedt@goodmis.org
Cc: juri.lelli@gmail.com
Cc: pang.xunlei@linaro.org
Cc: oleg@redhat.com
Cc: wanpeng.li@linux.intel.com
Cc: umgwanakikbuti@gmail.com
Link: http://lkml.kernel.org/r/20150611124742.424032725@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sched/rt.c')
| -rw-r--r-- | kernel/sched/rt.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 7d7093c51f8d..4f3726fe1246 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -354,13 +354,16 @@ static inline int has_pushable_tasks(struct rq *rq) return !plist_head_empty(&rq->rt.pushable_tasks); } -static inline void set_post_schedule(struct rq *rq) +static DEFINE_PER_CPU(struct callback_head, rt_balance_head); + +static void push_rt_tasks(struct rq *); + +static inline void queue_push_tasks(struct rq *rq) { - /* - * We detect this state here so that we can avoid taking the RQ - * lock again later if there is no need to push - */ - rq->post_schedule = has_pushable_tasks(rq); + if (!has_pushable_tasks(rq)) + return; + + queue_balance_callback(rq, &per_cpu(rt_balance_head, rq->cpu), push_rt_tasks); } static void enqueue_pushable_task(struct rq *rq, struct task_struct *p) @@ -417,7 +420,7 @@ static inline int pull_rt_task(struct rq *this_rq) return 0; } -static inline void set_post_schedule(struct rq *rq) +static inline void queue_push_tasks(struct rq *rq) { } #endif /* CONFIG_SMP */ @@ -1497,7 +1500,7 @@ pick_next_task_rt(struct rq *rq, struct task_struct *prev) /* The running task is never eligible for pushing */ dequeue_pushable_task(rq, p); - set_post_schedule(rq); + queue_push_tasks(rq); return p; } @@ -2042,11 +2045,6 @@ skip: return ret; } -static void post_schedule_rt(struct rq *rq) -{ - push_rt_tasks(rq); -} - /* * If we are not running and we are not going to reschedule soon, we should * try to push tasks away now @@ -2318,7 +2316,6 @@ const struct sched_class rt_sched_class = { .set_cpus_allowed = set_cpus_allowed_rt, .rq_online = rq_online_rt, .rq_offline = rq_offline_rt, - .post_schedule = post_schedule_rt, .task_woken = task_woken_rt, .switched_from = switched_from_rt, #endif |