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Date: Sun, 10 Mar 2002 09:13:58 -0800
From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Reply-To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: Samuel Ortiz <sortiz@dbear.engr.sgi.com>
cc: =?ISO-8859-1?Q?Dieter_N=FCtzel?= <Dieter.Nuetzel@hamburg.de>,
        Linux Kernel List <linux-kernel@vger.kernel.org>,
        Andrea Arcange <andrea@suse.de>, Ingo Molnar <mingo@elte.hu>,
        Robert Love <rml@tech9.net>, Oleg Drokin <green@namesys.com>
Subject: Re: 23 second kernel compile (aka which patches help scalibility on NUMA)
Message-ID: <210438344.1015751637@[10.10.2.3]>
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> Martin, I wrote a patch in order to have a kswap daemon per node. Each
> daemon swaps pages out only from its node. It might be of some interest
> for your scalability problem, so let me know if you're interested in it (I
> can't paste it here because it has also some other stuffs in it, and I

How does this interact with the virtual scanning stuff? I
was under the impression that we scanned for suitable pages
on a per-process basis ... so I'm confused as to how you'd
have a per-node kswapd without rmap's physical scanning
(unless you assume all processes on a node have all their
mem on that node). Could you explain? 

> have to split the patch in several parts. I also need to port it to -rmap).

I'd certainly be interested to see / try it - I think Bill Irwin
had an implementation of multiple kswapd's for rmap - you might
want to look at that before you port.

Thanks,

M

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