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Date: Tue, 25 Feb 2003 21:30:01 +0100
From: Andrea Arcangeli <andrea@suse.de>
To: "Martin J. Bligh" <mbligh@aracnet.com>
Cc: William Lee Irwin III <wli@holomorphy.com>, Andrew Morton <akpm@digeo.com>,
       Hanna Linder <hannal@us.ibm.com>, lse-tech@lists.sf.et,
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Subject: Re: Minutes from Feb 21 LSE Call
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On Tue, Feb 25, 2003 at 11:27:40AM -0800, Martin J. Bligh wrote:
> > the only solution is to do rmap lazily, i.e. to start building the rmap
> > during swapping by walking the pagetables, basically exactly like I
> > refill the lru with anonymous pages only after I start to need this
> > information recently in my 2.4 tree, so if you never need to pageout
> > heavily several giga of ram (like most of very high end numa servers),
> > you'll never waste a single cycle in locking or whatever other worthless
> > accounting overhead that hurts performance of all common workloads
> 
> Did you see the partially object-based rmap stuff? I think that does
> very close to what you want already.

I don't see how it can optimize away the overhead but I didn't look at
it for long.

Andrea
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