From: Tim Schmielau <tim@physik3.uni-rostock.de>
To: "Barry K. Nathan" <barryn@pobox.com>
Cc: Andrew Morton <akpm@osdl.org>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: swapspace layout improvements advocacy
Date: Sat, 15 Jan 2005 03:26:56 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.53.0501150320130.24136@gockel.physik3.uni-rostock.de> (raw)
In-Reply-To: <20050114225213.GA4841@ip68-4-98-123.oc.oc.cox.net>
On Fri, 14 Jan 2005, Barry K. Nathan wrote:
> I haven't tried the patch in question (unless it's in any Fedora
> kernels), but I've noticed that the single biggest step to improve
> swapping performance in 2.6 is to use the CFQ scheduler, not the AS
> scheduler. (That's also why Red Hat/Fedora kernels use CFQ as the
> default scheduler.)
Yes, I also use CFQ. Didn't dare to try with the anticipatory scheduler.
Since Andrew was so sceptical, I tested a bit more, and it's not as easily
reproducible as I wrote. There don't seem to be any problems on a freshly
booted system. It only happens after using the system for some time. But I
think that's only natural as the virtal->physical mapping needs to be
disturbed before seeing any problems.
Tim
next prev parent reply other threads:[~2005-01-15 2:27 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-05 0:32 page migration patchset Ray Bryant
2005-01-05 2:07 ` Andi Kleen
2005-01-05 3:20 ` Ray Bryant
2005-01-05 18:41 ` Steve Longerbeam
2005-01-05 19:23 ` Ray Bryant
2005-01-05 23:00 ` Steve Longerbeam
2005-01-05 23:16 ` Ray Bryant
2005-01-05 20:55 ` Hugh Dickins
[not found] ` <41DC7EAD.8010407@mvista.com>
2005-01-06 14:43 ` Andi Kleen
2005-01-06 16:00 ` Ray Bryant
2005-01-06 17:50 ` Christoph Lameter
2005-01-06 19:29 ` Andi Kleen
2005-01-06 22:30 ` William Lee Irwin III
2005-01-06 23:08 ` Andrew Morton
2005-01-06 23:15 ` William Lee Irwin III
2005-01-06 23:21 ` Ray Bryant
2005-01-06 23:35 ` William Lee Irwin III
2005-01-06 23:53 ` Anton Blanchard
2005-01-07 0:06 ` William Lee Irwin III
2005-01-07 0:31 ` Andi Kleen
2005-01-06 23:43 ` Steve Longerbeam
2005-01-06 23:58 ` William Lee Irwin III
2005-01-11 15:38 ` Ray Bryant
2005-01-11 19:00 ` Steve Longerbeam
2005-01-11 19:30 ` Ray Bryant
2005-01-11 20:59 ` Steve Longerbeam
2005-01-12 12:35 ` Robin Holt
2005-01-12 18:12 ` Hugh Dickins
2005-01-12 18:45 ` Ray Bryant
2005-01-12 18:53 ` Andrew Morton
2005-01-14 13:55 ` swapspace layout improvements advocacy Tim Schmielau
2005-01-14 18:15 ` Andrew Morton
2005-01-14 22:52 ` Barry K. Nathan
2005-01-15 0:33 ` Alan Cox
2005-01-15 2:26 ` Tim Schmielau [this message]
2005-01-15 8:55 ` Pasi Savolainen
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