From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Bligh <alex@alex.org.uk>
Subject: Re: Fatal crash on xen4.2 HVM + qemu-xen dm + NFS
Date: Wed, 16 Jan 2013 16:00:07 +0000
Message-ID: <C4F824C8C6438DD2EA963036@Ximines.local>
References: <5B4525F296F6ABEB38B0E614@nimrod.local>
	<50CEFDA602000078000B0B11@nat28.tlf.novell.com>
	<3B1D0701EAEA6532CEA91EA0@Ximines.local>
	<alpine.DEB.2.02.1301161302020.4978@kaball.uk.xensource.com>
	<F1DF150F7B2469CFD587A2A4@Ximines.local>
Reply-To: Alex Bligh <alex@alex.org.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <F1DF150F7B2469CFD587A2A4@Ximines.local>
Content-Disposition: inline
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Alex Bligh <alex@alex.org.uk>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Ian Campbell <Ian.Campbell@citrix.com>, Jan Beulich <JBeulich@suse.com>, Xen Devel <xen-devel@lists.xen.org>
List-Id: xen-devel@lists.xenproject.org



--On 16 January 2013 15:06:49 +0000 Alex Bligh <alex@alex.org.uk> wrote:

> If QEMU is completing writes before they've actually been done, haven't
> we got a wider set of problems to worry about?

One such problem would be 'what happens if the guest changes the data
after it has been written'. If I understand Stefano right, dom0
is referencing after the write is being marked as complete

-- 
Alex Bligh