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Message-ID: <28c262360809181449v1050c1f7ndf17dadba9fac0bf@mail.gmail.com>
Date: Fri, 19 Sep 2008 06:49:41 +0900
From: "MinChan Kim" <minchan.kim@gmail.com>
To: "Christoph Lameter" <cl@linux-foundation.org>
Subject: Re: Populating multiple ptes at fault time
Cc: "Martin Bligh" <mbligh@google.com>, "Chris Snook" <csnook@redhat.com>,
       "Jeremy Fitzhardinge" <jeremy@goop.org>,
       "Nick Piggin" <nickpiggin@yahoo.com.au>,
       "Hugh Dickens" <hugh@veritas.com>,
       "Linux Memory Management List" <linux-mm@kvack.org>,
       "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
       "Avi Kivity" <avi@qumranet.com>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       "Rik van Riel" <riel@redhat.com>
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On Fri, Sep 19, 2008 at 6:32 AM, Christoph Lameter
<cl@linux-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