WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] [PATCH] Handle older Xen save files where arbytes are in

To: John Levon <levon@xxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Handle older Xen save files where arbytes are in the wrong format.
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 12 Feb 2009 18:41:21 +0000
Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, "Keir.Fraser@xxxxxxxxxxxx" <Keir.Fraser@xxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Zhai, Edwin" <edwin.zhai@xxxxxxxxx>
Delivery-date: Thu, 12 Feb 2009 10:41:50 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20090212182034.GE20182@xxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcmNPpmk8Yq2xZ2cRp6vrhiKT/YaZQAAuX2y
Thread-topic: [Xen-devel] [PATCH] Handle older Xen save files where arbytes are in the wrong format.
User-agent: Microsoft-Entourage/12.15.0.081119
On 12/02/2009 18:20, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote:

>>> What happens with a new-format image on an old Xen?
>> 
>> Doesn't work
> 
> Sure, but doesn't work how? There's a world of difference between
> "crashes mysteriously" and "useful error message".

Mmm.. Most of the changes will cause restore failure rather than apparently
successful restore but you end up with a broken guest. I suppose this
segmentation change may act like the latter. I don't think there's been much
conscious effort to make new-on-old fail cleanly though.

 -- Keir



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel