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由 Peter Zijlstra 提交于
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: NPeter 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: NIngo Molnar <mingo@kernel.org>
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