提交 b6508c16 编写于 作者: V Vivek Goyal 提交者: Jens Axboe

cfq-iosched: Do not idle if slice_idle=0

Do not idle either on cfq queue or service tree if slice_idle=0. User does
not want any queue or service tree idling. Currently even if slice_idle=0,
we were waiting for request to finish before expiring the queue and that
can lead to lower queue depths.
Acked-by: NJeff Moyer <jmoyer@redhat.com>
Signed-off-by: NVivek Goyal <vgoyal@redhat.com>
Signed-off-by: NJens Axboe <jaxboe@fusionio.com>
上级 75230ff2
......@@ -1839,6 +1839,9 @@ static bool cfq_should_idle(struct cfq_data *cfqd, struct cfq_queue *cfqq)
BUG_ON(!service_tree);
BUG_ON(!service_tree->count);
if (!cfqd->cfq_slice_idle)
return false;
/* We never do for idle class queues. */
if (prio == IDLE_WORKLOAD)
return false;
......@@ -1879,7 +1882,7 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
/*
* idle is disabled, either manually or by past process history
*/
if (!cfqd->cfq_slice_idle || !cfq_should_idle(cfqd, cfqq))
if (!cfq_should_idle(cfqd, cfqq))
return;
/*
......
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