Messages in this thread | | | From | Jeff Moyer <> | Subject | Re: [PATCH] cfq-iosched: reduce write depth only if sync was delayed | Date | Mon, 07 Dec 2009 09:13:00 -0500 |
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Jens Axboe <jens.axboe@oracle.com> writes:
> On Sun, Dec 06 2009, Corrado Zoccolo wrote: >> Hi Jeff, >> I remember you saw large performance drop on your SAN for sequential >> writes with low_latency=1. Can you test if Shaohua's and this patch >> fix allow to recover some bandwidth? I think that enabling the queue >> depth ramp up only if a sync request was delayed should disable it for >> fast hardware like yours, so you should not be seeing the slowdown any >> more. > > I queued this up for post inclusion into 2.6.33, with the time_after() > fixed. > > The patch was word-wrapped, btw.
So in what branch can I find this fix? Once I know that I can queue up some tests.
Cheers, Jeff
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