'Live migrate an instance in its cell.'

def live_migrate_instance(self, ctxt, instance, block_migration, disk_over_commit, host_name):

    extra_kwargs = dict(block_migration=block_migration, disk_over_commit=disk_over_commit, host_name=host_name)
    self._instance_action(ctxt, instance, 'live_migrate_instance', extra_kwargs=extra_kwargs)
