Message-ID: <4BC38894.70109@redhat.com>
Date: Mon, 12 Apr 2010 16:54:44 -0400
From: Rik van Riel <riel@redhat.com>
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To: Linus Torvalds <torvalds@linux-foundation.org>
CC: Borislav Petkov <bp@alien8.de>, Johannes Weiner <hannes@cmpxchg.org>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Minchan Kim <minchan.kim@gmail.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
       Nick Piggin <npiggin@suse.de>, Andrea Arcangeli <aarcange@redhat.com>,
       Hugh Dickins <hugh.dickins@tiscali.co.uk>, sgunderson@bigfoot.com
Subject: Re: [PATCH 2/4] vma_adjust: fix the copying of anon_vma chains
References: <20100411130801.GA7189@a1.tnic> <alpine.LFD.2.00.1004110938570.3514@i5.linux-foundation.org> <alpine.LFD.2.00.1004111010280.3514@i5.linux-foundation.org> <20100411185508.GA4450@liondog.tnic> <alpine.LFD.2.00.1004111707360.3514@i5.linux-foundation.org> <alpine.LFD.2.00.1004111759440.3521@i5.linux-foundation.org> <20100412072056.GA2432@liondog.tnic> <alpine.LFD.2.00.1004120854440.26679@i5.linux-foundation.org> <alpine.LFD.2.00.1004120906370.26679@i5.linux-foundation.org> <4BC36916.3080005@redhat.com> <20100412190002.GA8595@a1.tnic> <alpine.LFD.2.00.1004121201480.3714@i5.linux-foundation.org> <alpine.LFD.2.00.1004121320390.3683@i5.linux-foundation.org> <alpine.LFD.2.00.1004121322400.3683@i5.linux-foundation.org>
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On 04/12/2010 04:23 PM, Linus Torvalds wrote:
>
> From: Linus Torvalds<torvalds@linux-foundation.org>
> Date: Sat, 10 Apr 2010 15:22:30 -0700
> Subject: [PATCH 2/4] vma_adjust: fix the copying of anon_vma chains
>
> When we move the boundaries between two vma's due to things like
> mprotect, we need to make sure that the anon_vma of the pages that got
> moved from one vma to another gets properly copied around.  And that was
> not always the case, in this rather hard-to-follow code sequence.
>
> Clarify the code, and fix it so that it copies the anon_vma from the
> right source.
>
> Signed-off-by: Linus Torvalds<torvalds@linux-foundation.org>

Reviewed-by: Rik van Riel <riel@redhat.com>

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