linux-kernel - Re: VM: Fix nasty and subtle race in shared mmap'ed page writeback

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Message-ID: <Pine.LNX.4.64.0701041318020.29210@blonde.wat.veritas.com>
Date:	Thu, 4 Jan 2007 13:25:55 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Andrew Morton <akpm@...l.org>
cc:	David Miller <davem@...emloft.net>, nickpiggin@...oo.com.au,
	torvalds@...l.org, gelma@...ma.net, linux-kernel@...r.kernel.org
Subject: Re: VM: Fix nasty and subtle race in shared mmap'ed page writeback

On Wed, 3 Jan 2007, Andrew Morton wrote:
> On Wed, 03 Jan 2007 22:56:07 -0800 (PST)
> David Miller <davem@...emloft.net> wrote:
> > From: Andrew Morton <akpm@...l.org>
> > > 
> > > It'd odd that stories of pre-2.6.19 BerkeleyDB corruption are now coming
> > > out of the woodwork.  It's the first I've ever heard of them.
> > 
> > Note that the original rtorrent debian bug report was against 2.6.18
> 
> I think that was 2.6.18+debian-added-dirty-page-tracking-patches.

That's right.  Debian's 2.6.18-3, not -stable's 2.6.18.3 as Linus feared.
I'll be sending 2.6.18-stable the fix to the msync ENOMEM-on-unmapped
issue later today (that little buglet being what led them to integrate
the much more interesting dirty page tracking patches, which happened
to fix it in passing).

Hugh
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