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

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Message-ID: <48D2C8DD.4040303@linux-foundation.org>
Date:	Thu, 18 Sep 2008 16:32:13 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Martin Bligh <mbligh@...gle.com>
CC:	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:

>> Well, I guess we need a new binary format that allows one to execute binaries
>> in kernel address space with full powers.
> 
> Seems ... extreme ;-)

Well yes ....

> Maybe we just do it if we're in readahead? (or similar)

If we are in kernel space then the binary can call the readahead function as
needed ... ;-O

Ok, seriously: Anonymous pages are not subject to readahead so it wont work.


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