Re: [Xen-devel] [PATCH v2 3/4] libxc: stop migration in case of p2m list structural changes

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 15/12/15 06:33, Juergen Gross wrote:
> With support of the virtual mapped linear p2m list for migration it is
> now possible to detect structural changes of the p2m list which before
> would either lead to a crashing or otherwise wrong behaving domU.
>
> A guest supporting the linear p2m list will increment the
> p2m_generation counter located in the shared info page before and after
> each modification of a mapping related to the p2m list. A change of
> that counter can be detected by the tools and reacted upon.
>
> As such a change should occur only very rarely once the domU is up the
> most simple reaction is to cancel migration in such an event.
>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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