linux-kernel - Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem

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Message-ID: <45DE6080.6030904@redhat.com>
Date:	Thu, 22 Feb 2007 22:33:20 -0500
From:	Rik van Riel <riel@...hat.com>
To:	yunfeng zhang <zyf.zeroos@...il.com>
CC:	linux-kernel@...r.kernel.org, Hugh Dickins <hugh@...itas.com>,
	linux-mm@...ck.org
Subject: Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem

yunfeng zhang wrote:
> Performance improvement should occur when private pages of multiple 
> processes are messed up,

Ummm, yes.  Linux used to do this, but doing virtual scans
just does not scale when a system has a really large amount
of memory, a large number of processes and multiple zones.

We've seen it fall apart with as little as 8GB of RAM.

-- 
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