linux-kernel - Re: Populating multiple ptes at fault time

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Message-ID: <48D2CEF3.6060308@linux-foundation.org>
Date:	Thu, 18 Sep 2008 16:58:11 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	MinChan Kim <minchan.kim@...il.com>
CC:	Martin Bligh <mbligh@...gle.com>, Chris Snook <csnook@...hat.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Hugh Dickens <hugh@...itas.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Avi Kivity <avi@...ranet.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>
Subject: Re: Populating multiple ptes at fault time

MinChan Kim wrote:

> In case of file-mapped pages, Shouldn't we use just on-demand
> readahead mechanism in kernel ?

Correct.

> If it is inefficient, It means we have to change on-demand readahead
> mechanism itself.

Right.

My patches were only for anonymous pages not for file backed because readahead
is available for file backed mappings.

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