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For vhost-user devices, a snapshot involved the vrings to be stopped, but they couldn't be resumed. This commit aims at fixing this by saving the vrings base so that it can be safely reset after the snapshot has succeeded. This will allow VMs where snapshots are taken from internal CH implementation and from an offload daemon to be resumed once the snapshot is complete. Signed-off-by: Sebastien Boeuf <sboeuf@meta.com> Assisted-by: Claude:claude-opus-4-8