Messages in this thread | | | Date | Mon, 7 Mar 2011 09:26:45 +0100 | From | Jens Axboe <> | Subject | Re: [PATCH]cfq-iosched: give busy sync queue no dispatch limit |
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On 2011-03-04 09:01, Shaohua Li wrote: > If there are a sync and an async queue and the sync queue's think time is small, > we can ignore the sync queue's dispatch quantum. Because the sync queue will > always preempt the async queue, we don't need to care about async's latency. > This can fix a performance regression of aiostress test, which is introduced by > commit f8ae6e3eb825. The issue should exist even without the commit, but the > commit amplifies the impact. > > The initial post does the same optimization for RT queue too, but since I have > no real workload for it, Vivek suggests to drop it.
Thanks, applied.
-- Jens Axboe
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