Re: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon

From:		Linus Torvalds <torvalds-AT-linux-foundation.org>
To:		Borislav Petkov <bp-AT-alien8.de>
Subject:		Re: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon_vmas of a mergeable VMA
Date:		Sat, 10 Apr 2010 14:30:49 -0700 (PDT)
Cc:		Johannes Weiner <hannes-AT-cmpxchg.org>, KOSAKI Motohiro <kosaki.motohiro-AT-jp.fujitsu.com>, Rik van Riel <riel-AT-redhat.com>, Andrew Morton <akpm-AT-linux-foundation.org>, Minchan Kim <minchan.kim-AT-gmail.com>, Linux Kernel Mailing List <linux-kernel-AT-vger.kernel.org>, Lee Schermerhorn <Lee.Schermerhorn-AT-hp.com>, Nick Piggin <npiggin-AT-suse.de>, Andrea Arcangeli <aarcange-AT-redhat.com>, Hugh Dickins <hugh.dickins-AT-tiscali.co.uk>, sgunderson-AT-bigfoot.com
Archive-link:		Article, Thread

On Sat, 10 Apr 2010, Borislav Petkov wrote:
> 
> Damn, nope, still no joy :(. It looked like it was fixed but one of the
> test was to hibernate right after the 3 kvm guests were shut down and I
> guess the mem freeing pattern kinda hits it where it most hurts.

Damn, I really hoped that was it. Three independent bugs found and fixed, 
and still no joy? Oh well.

> By the way, do we want to create a new thread - the mailchain is off the
> screen limits of my netbook :)

I prefer to keep it in one thread so that they all show up together if I 
need to, but feel free to start a new one. Not a biggie.

> [  647.492781] BUG: unable to handle kernel NULL pointer dereference at (null)
> [  647.493001] IP: [<ffffffff810c60a0>] page_referenced+0xee/0x1dc

Well, it sure is consistent. I'll start to think about what else could go 
wrong..

		Linus

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Re: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon_vmas of a mergeable VMA