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Date: Tue, 29 Jan 2002 15:25:26 -0200 (BRST)
From: Rik van Riel <riel@conectiva.com.br>
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To: Oliver Xymoron <oxymoron@waste.org>
Cc: Daniel Phillips <phillips@bonn-fries.net>,
        Linus Torvalds <torvalds@transmeta.com>,
        Josh MacDonald <jmacd@CS.Berkeley.EDU>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        <reiserfs-list@namesys.com>, <reiserfs-dev@namesys.com>
Subject: Re: Note describing poor dcache utilization under high memory pressure
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On Tue, 29 Jan 2002, Oliver Xymoron wrote:

> Daniel's approach seems to be workable (once he's spelled out all the
> details) but it misses the big performance win for fork/exec, which is
> surely the common case. Given that exec will be throwing away all these
> mappings, we can safely assume that we will not be inheriting many shared
> mappings from parents of parents so Daniel's approach also still ends up
> marking most of the pages RO still.

It gets worse.  His approach also needs to adjust the reference
counts on all pages (and swap pages).

kind regards,

Rik
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