From: Andi Kleen <ak@muc.de>
To: Rik van Riel <riel@redhat.com>
Cc: linux-kernel@vger.kernel.org, clameter@sgi.com
Subject: Re: NUMA: Patch for node based swapping
Date: Tue, 12 Oct 2004 21:57:09 +0200 [thread overview]
Message-ID: <m3llebn20a.fsf@averell.firstfloor.org> (raw)
In-Reply-To: <2OwUX-Ua-23@gated-at.bofh.it> (Rik van Riel's message of "Tue, 12 Oct 2004 17:40:11 +0200")
Rik van Riel <riel@redhat.com> writes:
> On Tue, 12 Oct 2004, Christoph Lameter wrote:
>
>> The minimum may be controlled through /proc/sys/vm/node_swap.
>> By default node_swap is set to 100 which means that kswapd will be run on
>> a zone if less than 10% are available after allocation.
>
> That sounds like an extraordinarily bad idea for eg. AMD64
> systems, which have a very low numa factor.
As a optional sysctl it makes sense even on AMD64. On some benchmarks
you see the differences between local and remote memory very clearly.
-Andi
next parent reply other threads:[~2004-10-12 19:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2OwBD-HV-31@gated-at.bofh.it>
[not found] ` <2OwUX-Ua-23@gated-at.bofh.it>
2004-10-12 19:57 ` Andi Kleen [this message]
2004-10-12 21:38 ` NUMA: Patch for node based swapping Ray Bryant
2004-10-12 15:02 Christoph Lameter
2004-10-12 15:16 ` Martin J. Bligh
2004-10-12 15:38 ` Christoph Lameter
2004-10-12 15:20 ` Jan-Benedict Glaw
2004-10-12 15:27 ` Rik van Riel
2004-10-12 15:39 ` Christoph Lameter
2004-10-12 15:52 ` Rik van Riel
2004-10-12 20:20 ` Christoph Lameter
2004-10-13 10:59 ` Nick Piggin
2004-10-12 19:33 ` Anton Blanchard
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