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Date: Tue, 29 Jan 2002 21:35:38 -0200 (BRST)
From: Rik van Riel <riel@conectiva.com.br>
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linus Torvalds <torvalds@transmeta.com>,
        "David S. Miller" <davem@redhat.com>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Radix-tree pagecache for 2.5
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On Tue, 29 Jan 2002, Alan Cox wrote:

> > We can let oracle shared memory segments use 4 MB pages,
> > but still use the normal page cache code to look up the
> > pages.
>
> That has some potential big wins beyond oracle. Some of the big number
> crunching algorithms also benefit heavily from 4Mb pages even when you
> try and minimise tlb misses.

Note that I'm not sure whether the complexity of using
4 MB pages is worth it or not ... I just like the fact
that the radix tree page cache gives us the opportunity
to easily implement and try it.

I like radix trees for making our design more flexible
and opening doors to possible new functionality.

It could even be a CONFIG option for the embedded folks,
if we can keep the code isolated enough ;)

cheers,

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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