[openib-general] Re: RFC userspace / MPI multicast support

[Michael S. Tsirkin]

Quoting r. Sean Hefty <sean.hefty at intel.com>:
> Subject: RFC userspace / MPI multicast support
> 
> I'd like to get some feedback regarding the following approach to supporting
> multicast groups in userspace, and in particular for MPI.  Based on side
> conversations, I need to know if this approach would meet the needs of MPI
> developers.
> 
> To join / leave a multicast group, my proposal is to add the following APIs to
> the rdma_cm.  (Note I haven't implemented this yet, so I'm just assuming that
> it's possible at this point.)

Since there's no CM involved in creating UD QPs, and since there's no multicast
rdma, rdma_cm seems like a weird place for multicast.

Would it make more sense to create a separate module for multicast stuff?

-- 
MST