[cinder] Is the cinder Active-Active feature OK？

Hello, In my opinion, all rest api will get to manager of cinder volume. If the manager is using DLM, we can say cinder volume can support active-active. So, can we rewrite the comments and option's help in page https://github.com/openstack/cinder/blob/master/cinder/cmd/volume.py#L78 ? Thanks a lot. -- 谦谦君子