[openib-general] [RFC/PATCH] librdmacm: use the ipoib broadcast group qkey

[Sean Hefty]

>Maybe just ask user to always call rdma_join_multicast after rdma_create_qp?
>Joins are now properly reference counted, so it shouldn't be a problem
>to repeat this any number of times. Right?

This is the solution for now, and it should work fine.  I don't think it would
be hard to support creating the QP after joining if someone ever came up with
the need, but it doesn't seem like a priority at the moment.

- Sean