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

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Date:	Fri, 19 Sep 2008 06:49:41 +0900
From:	"MinChan Kim" <minchan.kim@...il.com>
To:	"Christoph Lameter" <cl@...ux-foundation.org>
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

On Fri, Sep 19, 2008 at 6:32 AM, Christoph Lameter
<cl@...ux-foundation.org> wrote:
> 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

In case of file-mapped pages, Shouldn't we use just on-demand
readahead mechanism in kernel ?
If it is inefficient, It means we have to change on-demand readahead
mechanism itself.
How about you ?

> Ok, seriously: Anonymous pages are not subject to readahead so it wont work.
>
>
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-- 
Kinds regards,
MinChan Kim
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