cfq-iosched: commenting non-obvious initialization
Added a comment to explain the initialization of last_delayed_sync. Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@ -3759,6 +3759,10 @@ static void *cfq_init_queue(struct request_queue *q)
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cfqd->cfq_latency = 1;
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cfqd->cfq_group_isolation = 0;
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cfqd->hw_tag = -1;
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/*
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* we optimistically start assuming sync ops weren't delayed in last
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* second, in order to have larger depth for async operations.
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*/
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cfqd->last_delayed_sync = jiffies - HZ;
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INIT_RCU_HEAD(&cfqd->rcu);
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return cfqd;
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