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Re: [Xen-devel] [PATCH] xen: update machine_to_phys_order on resume

from [Jan Beulich] [Permanent Link][Original]
To: <Ian.Campbell@xxxxxxxxxx>,<konrad.wilk@xxxxxxxxxx>, <keir@xxxxxxx>
Subject: Re: [Xen-devel] [PATCH] xen: update machine_to_phys_order on resume
From: "Jan Beulich" <jbeulich@xxxxxxxxxx>
Date: Wed, 13 Jul 2011 15:29:11 +0100
Cc: olaf@xxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
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>>> Ian Campbell <Ian.Campbell@xxxxxxxxxx> 07/13/11 11:12 AM >>>
>It's not so much an objection to this patch but this issue seems to have
>been caused by Xen cset 20892:d311d1efc25e which looks to me like a
>subtle ABI breakage for guests. Perhaps we should introduce a feature
>flag to indicate that a guest can cope with the m2p changing size over
>migration like this?

Indeed - migration was completely beyond my consideration when
submitting this. A feature flag seems the right way to go to me.

Jan
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