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

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Message-ID: <48D2D22B.2070408@linux-foundation.org>
Date:	Thu, 18 Sep 2008 17:11:55 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Martin Bligh <mbligh@...gle.com>
CC:	MinChan Kim <minchan.kim@...il.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

Martin Bligh wrote:
>> My patches were only for anonymous pages not for file backed because readahead
>> is available for file backed mappings.
> 
> Do we populate the PTEs though? I didn't think that was batched, but I
> might well be wrong.

We do not populate the PTEs and AFAICT PTE population was assumed not to be
performance critical since the backing media is comparatively slow.

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