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transient information regarding a domain. This allows live localhost migration, which is important for testing migration, and also allows migration when we have a distributed store. The backend paths in the store now refer to the frontend domain ID, not its UUID, and blktap has changed to match. To support this split in the information, the cleanup procedure has been split to match. Change the save-restore interface between XendDomain, XendDomainInfo, and XendCheckpoint, to remove some intermingling, in particular taking XendDomain out of the loop for the restore procedure. Improved the recovery procedure to avoid trying to destroy dom0 when recovering. Added a lock around XendDomain.refresh and one around XendDomainInfo.refreshShutdown, to improve the behaviour when recreating domains at startup. There are still races here, so more thought needs to be given to the locking. Live reconfiguration of an existing domain is temporarily broken. Signed-off-by: Ewan Mellor <ewan@xensource.com>