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Date: Fri, 27 Nov 2009 13:36:20 +0900 (JST) From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: Mel Gorman <mel@....ul.ie> Cc: kosaki.motohiro@...fujitsu.com, Jens Axboe <jens.axboe@...cle.com>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Frans Pop <elendil@...net.nl>, Jiri Kosina <jkosina@...e.cz>, Sven Geggus <lists@...hsschwanzdomain.de>, Karol Lewandowski <karol.k.lewandowski@...il.com>, Tobias Oetiker <tobi@...iker.ch>, Pekka Enberg <penberg@...helsinki.fi>, Rik van Riel <riel@...hat.com>, Christoph Lameter <cl@...ux-foundation.org>, Stephan von Krawczynski <skraw@...net.com>, "Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [PATCH-RFC] cfq: Disable low_latency by default for 2.6.32 > Signed-off-by: Mel Gorman <mel@....ul.ie> > --- > block/cfq-iosched.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c > index aa1e953..dc33045 100644 > --- a/block/cfq-iosched.c > +++ b/block/cfq-iosched.c > @@ -2543,7 +2543,7 @@ static void *cfq_init_queue(struct request_queue *q) > cfqd->cfq_slice[1] = cfq_slice_sync; > cfqd->cfq_slice_async_rq = cfq_slice_async_rq; > cfqd->cfq_slice_idle = cfq_slice_idle; > - cfqd->cfq_latency = 1; > + cfqd->cfq_latency = 0; > cfqd->hw_tag = 1; > cfqd->last_end_sync_rq = jiffies; > return cfqd; Great. Probably we can reenable this feature at 2.6.33. but there isn't any reason to take any risk at 2.6.32. i.e. This simple disabling is best. I like this. Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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