For now, it has no effect. It will be used in dump detach support.
Signed-off-by: NPeter Xu <peterx@redhat.com>
Reviewed-by: NFam Zheng <famz@redhat.com>
Message-Id: <1455772616-8668-5-git-send-email-peterx@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>