From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: raw disks no longer work in latest kvm (kvm-88 was fine)
Date: Sun, 7 Mar 2010 05:00:22 -0500
Message-ID: <20100307100022.GA23201@infradead.org>
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Cc: Antoine Martin <antoine@nagafix.co.uk>, kvm@vger.kernel.org
To: Michael Tokarev <mjt@tls.msk.ru>
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On Sun, Mar 07, 2010 at 12:32:38PM +0300, Michael Tokarev wrote:
> Antoine Martin wrote:
> []
> >> https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2933400&group_id=180599
> >>
> >>    
> > The initial report is almost 8 weeks old!
> > Is data-corruption and data loss somehow less important than the
> > hundreds of patches that have been submitted since?? Or is there a fix
> > somewhere I've missed?
> 
> I can only guess that the info collected so far is not sufficient to
> understand what's going on: except of "I/O error writing block NNN"
> we does not have anything at all.  So it's impossible to know where
> the problem is.

Actually it is, and the bug has been fixed long ago in:

commit e2a305fb13ff0f5cf6ff805555aaa90a5ed5954c
Author: Christoph Hellwig <hch@lst.de>
Date:   Tue Jan 26 14:49:08 2010 +0100

    block: avoid creating too large iovecs in multiwrite_merge


I've asked for it be added to the -stable series but that hasn't
happened so far.