Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk12-R6
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Andrew Morton <akpm@osdl.org>
Cc: Ingo Molnar <mingo@elte.hu>, rlrevell@joe-job.com,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       felipe_alfaro@linuxmail.org, mista.tapas@gmx.net, kr@cybsft.com,
       Mark_H_Johnson@Raytheon.com
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Date: Thu, 09 Sep 2004 21:09:57 +0100
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On Iau, 2004-09-09 at 21:05, Andrew Morton wrote:
> I did a patch a while back which switches the swapspace allocator over to
> perform program-virtual-address clustering, but it didn't help much in
> brief testing and I haven't got back onto it.
> 
> And contrary to my above assertion, I don't think it'll help latency ;)

I would still expect the only thing to materially improve swap latency
to be a log structured swap, possibly with a cleaner which tidies
together pages that are referenced together.


You also want contiguous runs of at least 64K and probaly a lot more on
bigger memory systems. 

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