Re: [patch 08/15] sched: throttle cfs_rq entities which exceedtheir local runtime

[Peter Zijlstra]

On Tue, 2011-05-03 at 02:28 -0700, Paul Turner wrote:
> +       task_delta = -cfs_rq->h_nr_running;
> +       for_each_sched_entity(se) {
> +               struct cfs_rq *qcfs_rq = cfs_rq_of(se);
> +               /* throttled entity or throttle-on-deactivate */
> +               if (!se->on_rq)
> +                       break;
> +
> +               if (dequeue)
> +                       dequeue_entity(qcfs_rq, se, DEQUEUE_SLEEP);
> +               qcfs_rq->h_nr_running += task_delta;
> +
> +               if (qcfs_rq->load.weight)
> +                       dequeue = 0;
> +       }
> +
> +       if (!se)
> +               rq->nr_running += task_delta; 

So throttle is like dequeue, it removes tasks, so why then insist on
writing it like its adding tasks? (I see you're adding a negative
number, but its all just weird).
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