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Re: [PATCH v5] docs/designs: re-work the xenstore migration document...

Hi Paul,

On 28/04/2020 16:06, Paul Durrant wrote:
From: Paul Durrant <pdurrant@xxxxxxxxxx>

... to specify a separate migration stream that will also be suitable for
live update.

The original scope of the document was to support non-cooperative migration
of guests [1] but, since then, live update of xenstored has been brought into
scope. Thus it makes more sense to define a separate image format for
serializing xenstore state that is suitable for both purposes.

The document has been limited to specifying a new image format. The mechanism
for acquiring the image for live update or migration is not covered as that
is more appropriately dealt with by a patch to docs/misc/xenstore.txt. It is
also expected that, when the first implementation of live update or migration
making use of this specification is committed, that the document is moved from
docs/designs into docs/specs.

NOTE: It will only be necessary to save and restore state for active xenstore
       connections, but the documentation for 'RESUME' in xenstore.txt implies
       otherwise. That command is unused so this patch deletes it from the

[1] See 

Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>

Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

I will wait until tomorrow afternoon (BST) to give an opportunity to other to comment.


Julien Grall



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