linux-kernel - Re: [PATCH -mm] change anon_vma linking to fix multi-process server scalability issue

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Message-ID: <4B623757.7090001@redhat.com>
Date:	Thu, 28 Jan 2010 20:18:15 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Minchan Kim <minchan.kim@...il.com>
CC:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	lwoodman@...hat.com, akpm@...ux-foundation.org,
	Lee Schermerhorn <Lee.Schermerhorn@...com>, aarcange@...hat.com
Subject: Re: [PATCH -mm] change anon_vma linking to fix multi-process server
 	scalability issue

On 01/28/2010 07:55 PM, Minchan Kim wrote:
> On Fri, Jan 29, 2010 at 2:24 AM, Rik van Riel<riel@...hat.com>  wrote:

>> What am I overlooking?
>
> I also look at the code more detail and found me wrong.
> In mprotect case 6,  the importer is fixed as head of vmas while next
> is marched
> on forward. So anon_vma_clone is just called once at first time.
> So as what you said, It's no problem.
> Totally, my mistake. Sorry for that, Rik.

No problem.  I spent about a day and a half with a few pieces
of paper going over all this code, before deciding how to code
this :)

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