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

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Message-ID: <48D2C46A.5030702@linux-foundation.org>
Date:	Thu, 18 Sep 2008 16:13:14 -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:
>>> Yup, basically you're assuming good locality of reference, but it turns
>>> out that (as davej would say) "userspace sucks".
>> Well, *most* userspace sucks.  It might still be worthwhile to do this when
>> userspace is using madvise().
> 
> Quite possibly true ... something to benchmark.

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


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