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| author |   Peter Zijlstra <peterz@infradead.org> | 2016-06-22 14:58:02 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2016-06-27 12:17:55 +0200 |
| commit | 8663e24d56dc1f093232783c23ea17f2a6f61c03 (patch) | |
| tree | e9f4d49bcf7324a34c78cdd7ed38b32f9c385843 /kernel/sched/core.c | |
| parent | sched/fair: Apply more PELT fixes (diff) | |
| download | wireguard-linux-8663e24d56dc1f093232783c23ea17f2a6f61c03.tar.xz wireguard-linux-8663e24d56dc1f093232783c23ea17f2a6f61c03.zip | |
sched/fair: Reorder cgroup creation code
A future patch needs rq->lock held _after_ we link the task_group into
the hierarchy. In order to avoid taking every rq->lock twice, reorder
things a little and create online_fair_sched_group() to be called
after we link the task_group.
All this code is still ran from css_alloc() so css_online() isn't in
fact used for this.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
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>
Cc: bsegall@google.com
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 14afa518948c..4ede4fc65653 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7717,6 +7717,8 @@ void sched_online_group(struct task_group *tg, struct task_group *parent) INIT_LIST_HEAD(&tg->children); list_add_rcu(&tg->siblings, &parent->children); spin_unlock_irqrestore(&task_group_lock, flags); + + online_fair_sched_group(tg); } /* rcu callback to free various structures associated with a task group */ |