[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 3/4] libxc: stop migration in case of p2m list structural changes
On Wed, Dec 16, 2015 at 10:24:19AM +0100, 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> Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx> _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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