Messages in this thread | | | Date | Tue, 5 Apr 2016 20:02:52 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC v2 3/7] Improve the tracking of active utilisation |
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On Tue, Apr 05, 2016 at 07:56:57PM +0200, luca abeni wrote:
> > > + migrate_active = hrtimer_active(&p->dl.inactive_timer); > > > + if (migrate_active) > > > + sub_running_bw(&p->dl, &rq->dl); > > > + raw_spin_unlock(&rq->lock); > > > > At this point task_rq() is still the above rq, so if the inactive timer > > hits here it will lock this rq and subtract the running bw here _again_, > > right? > I think it will see the task state as TASK_RUNNING, so it will do nothing. > Or it will cancelled later when the task is enqueued... I'll double check this.
Right, so this is select_task_rq_dl(), we run this in wakeups, before TASK_RUNNING.
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