Commit cc197479 authored by Jens Axboe's avatar Jens Axboe Committed by Jens Axboe
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cfq-iosched: tighten queue request overlap condition 



For tagged devices, allow overlap of requests if the idle window
isn't enabled on the current active queue.

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 3ed9a296

block/cfq-iosched.c

+2 −1
Original line number Diff line number Diff line
@@ -989,7 +989,8 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd) 
	 * flight or is idling for a new request, allow either of these

	 * conditions to happen (or time out) before selecting a new queue.

	 */

	if (cfqq->dispatched || timer_pending(&cfqd->idle_slice_timer)) {

	if (timer_pending(&cfqd->idle_slice_timer) ||

	    (cfqq->dispatched && cfq_cfqq_idle_window(cfqq))) {

		cfqq = NULL;

		goto keep_queue;

	}