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Date: Fri, 27 Nov 2009 15:29:10 +0900 (JST) From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> Cc: kosaki.motohiro@...fujitsu.com, Mel Gorman <mel@....ul.ie>, Corrado Zoccolo <czoccolo@...il.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 > Instead, PF_MEMALLOC is good idea? This patch was obviously wrong. please forget it. i'm sorry. > > > Subject: [PATCH] cfq: Do not limit the async queue depth while memory reclaim > > Not-Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> (I haven't test this) > --- > block/cfq-iosched.c | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) > > diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c > index aa1e953..9546f64 100644 > --- a/block/cfq-iosched.c > +++ b/block/cfq-iosched.c > @@ -1308,7 +1308,8 @@ static bool cfq_may_dispatch(struct cfq_data *cfqd, struct cfq_queue *cfqq) > * We also ramp up the dispatch depth gradually for async IO, > * based on the last sync IO we serviced > */ > - if (!cfq_cfqq_sync(cfqq) && cfqd->cfq_latency) { > + if (!cfq_cfqq_sync(cfqq) && cfqd->cfq_latency && > + !(current->flags & PF_MEMALLOC)) { > unsigned long last_sync = jiffies - cfqd->last_end_sync_rq; > unsigned int depth; > > -- > 1.6.5.2 > > > > > > -- 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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