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Re: [Xen-devel] [PATCH v9 03/25] libxc/migration: Specification update for DIRTY_PFN_LIST records

On Wed, 2016-01-27 at 15:12 +0800, Wen Congyang wrote:
> On 01/27/2016 04:44 AM, Konrad Rzeszutek Wilk wrote:
> > > +
> > 
> > Perhaps make it part of the optional and prefix it with CHECKPOINT?
> IIUC, optional record can be ignored, but this record cannot be ignored.
> To Andrew Cooper:
> Should I mark this record as optional record?

My understanding was that this indicated things for which support was
mandatory (whereas unknown optional ones may be ignored), not that they
must be present in every stream.

IOW placing this in the mandatory flags is correct, since the restorer
cannot simply ignore a checkpoint flag.


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