linux-kernel - Re: [RFC] Limit the size of the pagecache

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Message-ID: <45B835FE.6030107@redhat.com>
Date:	Wed, 24 Jan 2007 23:45:50 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>
CC:	Christoph Lameter <clameter@....com>,
	Aubrey Li <aubreylee@...il.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Robin Getz <rgetz@...ckfin.uclinux.org>,
	"Henn, erich, Michael" <Michael.Hennerich@...log.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC] Limit the size of the pagecache

Vaidyanathan Srinivasan wrote:

> In my opinion, once a
> file page is mapped by the process, then it should be treated at par
> with anon pages.  Application programs generally do not mmap a file
> page if the reuse for the content is very low.

Why not have the VM measure this, instead of making wild
assumptions about every possible workload out there?

There are a few databases out there that mmap the whole
thing.  Sleepycat for one...

-- 
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