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cfq-iosched: tighten queue request overlap condition

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

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-04-20 20:45:39 +02:00 committed by Jens Axboe
parent 3ed9a2965c
commit cc19747977
1 changed files with 2 additions and 1 deletions
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block/cfq-iosched.c
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@ -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 * flight or is idling for a new request, allow either of these
* conditions to happen (or time out) before selecting a new queue. * 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; cfqq = NULL;
goto keep_queue; goto keep_queue;
} }