RE: [RFC] RDMA CM + XRC, take two

quoted

I guess I need to go back and study the specs more to understand why the

QPN is in the REQ.

I looked at the kernel headers; struct cm_req_msg and cm_rep_msg, and
they both contain the QP numbers.

I was referring only to *why* the XRC TGT QP needed to know the XRC INI QPN (at a conceptual level).  I think it's for control messages.
 

quoted

The REQ/REP also carry EECN fields which might be usable here, and maybe

that was the intent.

The XRC spec does not make room for the srq number. Which implies it's left
to the application to transmit it.

Agreed - I was wondering if using the EECN would work, but I don't think that it does.  There would typically be multiple SRQs targeted by a single XRC INI->TGT connection.  Maybe SIDR could be adopted for this purpose as the standard discovery technique.

- Sean
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