• Peter Zijlstra's avatar
    sched/fair: Reorder cgroup creation code · 8663e24d
    Peter Zijlstra authored
    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: default avatarPeter 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: default avatarIngo Molnar <mingo@kernel.org>
    8663e24d
core.c 212 KB