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Date: Tue, 29 Jan 2002 09:38:50 -0200 (BRST)
From: Rik van Riel <riel@conectiva.com.br>
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To: Daniel Phillips <phillips@bonn-fries.net>
Cc: Oliver Xymoron <oxymoron@waste.org>,
        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, Daniel Phillips wrote:

> > Either that, or we don't populate the page tables of the
> > parent and the child at all and have the page tables
> > filled in at fault time.
>
> Yes, you could go that route but you'd have to do some weird and wonderful
> bookkeeping to figure out how to populate those page tables.

Not really, if the page table isn't present you just check whether
you need to allocate a new one or whether you need to instantiate
one.

That can all be done from within pte_alloc, which is always called
by handle_mm_fault()...

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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