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Date: Mon, 25 Feb 2002 22:40:40 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
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To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Cc: Shawn Starr <spstarr@sh0n.net>, Linux <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.19-preX: What we really need: -AA patches finally in the
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On Mon, 25 Feb 2002, Martin J. Bligh wrote:

> > Not to begin the flamewar, but no thanks. rmap-12f blows -aa away AFAIK
> > on this P200 w/ 64MB ram.
>
> rmap still sucks on large systems though. I'd love to see rmap
> in the main kernel, but it needs to get the scalability fixed first.
> The main problem seems to be pagemap_lru_lock ... Rik & crew
> know about this problem, but let's give them some time to fix it
> before rmap gets put into mainline ....

This isn't very near on my TODO list though, I've got
the following big items coming up shortly:

rmap 13:   O(1) page_launder    <- working on it now

rmap 14:   pte-highmem support

In addition to this I'm merging some small pieces of code
with both Linus and Marcelo.

Making the locking more scaleable wrt. the pagemap_lru_lock
could be either a simple change or a rework of the way the
VM does locking. I'm not sure which way to go...

regards,

Rik
-- 
"Linux holds advantages over the single-vendor commercial OS"
    -- Microsoft's "Competing with Linux" document

http://www.surriel.com/		http://distro.conectiva.com/

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