linux-kernel - Re: missing madvise functionality

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Date:	Tue, 03 Apr 2007 10:10:15 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Rik van Riel <riel@...hat.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Jakub Jelinek <jakub@...hat.com>
Subject: Re: missing madvise functionality

Rik van Riel wrote:
> I already started looking into implementing this.
> 
> Basically:
> [...]

Sounds good.  Except:


> 1) on MADV_DONTNEED, mark pages clean, not accessed and move them
>    to some "dontneed" LRU list.

LRU is likely the wrong answer.  The longer a page has not been reused
the more likely it won't be.  So, the dontneed-list  should be a simple
FIFO.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖


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