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authorPeter Zijlstra <peterz@infradead.org>2015-06-11 14:46:37 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-06-19 00:25:26 +0200
commite3fca9e7cbfb72694a21c886fcdf9f059cfded9c (patch)
tree59d47a653d9c86b7537810344c6d5d7702785fe1 /kernel/sched/deadline.c
parent624bbdfac99c50bf03dff9a0023f666b8e965627 (diff)
downloadop-kernel-dev-e3fca9e7cbfb72694a21c886fcdf9f059cfded9c.zip
op-kernel-dev-e3fca9e7cbfb72694a21c886fcdf9f059cfded9c.tar.gz
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/deadline.c')
-rw-r--r--kernel/sched/deadline.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 7a08d59..d80523f 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -213,9 +213,16 @@ static inline bool need_pull_dl_task(struct rq *rq, struct task_struct *prev)
return dl_task(prev);
}
-static inline void set_post_schedule(struct rq *rq)
+static DEFINE_PER_CPU(struct callback_head, dl_balance_head);
+
+static void push_dl_tasks(struct rq *);
+
+static inline void queue_push_tasks(struct rq *rq)
{
- rq->post_schedule = has_pushable_dl_tasks(rq);
+ if (!has_pushable_dl_tasks(rq))
+ return;
+
+ queue_balance_callback(rq, &per_cpu(dl_balance_head, rq->cpu), push_dl_tasks);
}
static struct rq *find_lock_later_rq(struct task_struct *task, struct rq *rq);
@@ -296,7 +303,7 @@ static inline int pull_dl_task(struct rq *rq)
return 0;
}
-static inline void set_post_schedule(struct rq *rq)
+static inline void queue_push_tasks(struct rq *rq)
{
}
#endif /* CONFIG_SMP */
@@ -1126,7 +1133,7 @@ struct task_struct *pick_next_task_dl(struct rq *rq, struct task_struct *prev)
if (hrtick_enabled(rq))
start_hrtick_dl(rq, p);
- set_post_schedule(rq);
+ queue_push_tasks(rq);
return p;
}
@@ -1544,11 +1551,6 @@ skip:
return ret;
}
-static void post_schedule_dl(struct rq *rq)
-{
- push_dl_tasks(rq);
-}
-
/*
* Since the task is not running and a reschedule is not going to happen
* anytime soon on its runqueue, we try pushing it away now.
@@ -1784,7 +1786,6 @@ const struct sched_class dl_sched_class = {
.set_cpus_allowed = set_cpus_allowed_dl,
.rq_online = rq_online_dl,
.rq_offline = rq_offline_dl,
- .post_schedule = post_schedule_dl,
.task_woken = task_woken_dl,
#endif
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