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Date: Mon, 5 Aug 2002 10:57:53 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
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To: Daniel Phillips <phillips@arcor.de>
cc: Andrew Morton <akpm@zip.com.au>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Rmap speedup
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On Mon, 5 Aug 2002, Daniel Phillips wrote:

> > Despite the fact that the number of pte_chain references in
> > page_add/remove_rmap now just averages two in that test.
>
> It's weird that it only averages two.  It's a four way and your running
> 10 in parallel, plus a process to watch for completion, right?

I explained this one in the comment above the declaration of
struct pte_chain ;)

 * A singly linked list should be fine for most, if not all, workloads.
 * On fork-after-exec the mapping we'll be removing will still be near
 * the start of the list, on mixed application systems the short-lived
 * processes will have their mappings near the start of the list and
 * in systems with long-lived applications the relative overhead of
 * exit() will be lower since the applications are long-lived.

cheers,

Rik
-- 
Bravely reimplemented by the knights who say "NIH".

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

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