Message-ID: <45B835FE.6030107@redhat.com>
Date: Wed, 24 Jan 2007 23:45:50 -0500
From: Rik van Riel <riel@redhat.com>
Organization: Red Hat, Inc
User-Agent: Thunderbird 1.5.0.7 (X11/20061008)
MIME-Version: 1.0
To: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
CC: Christoph Lameter <clameter@sgi.com>, Aubrey Li <aubreylee@gmail.com>,
       Nick Piggin <nickpiggin@yahoo.com.au>,
       Robin Getz <rgetz@blackfin.uclinux.org>,
       "Henn, erich, Michael" <Michael.Hennerich@analog.com>,
       linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] Limit the size of the pagecache
References: <Pine.LNX.4.64.0701231645260.5239@schroedinger.engr.sgi.com> <45B75208.90208@linux.vnet.ibm.com> <Pine.LNX.4.64.0701240655400.9696@schroedinger.engr.sgi.com> <45B82F41.9040705@linux.vnet.ibm.com>
In-Reply-To: <45B82F41.9040705@linux.vnet.ibm.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 863
Lines: 22

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...

-- 
Politics is the struggle between those who want to make their country
the best in the world, and those who believe it already is.  Each group
calls the other unpatriotic.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/