[ofa-general] tcp/rdma port unification patch in librdmacm

[Steve Wise]

Hey Sean,

It seems like kernel RDMA protocols are all getting IANA-assigned port 
numbers that alleviates the need for TCP/RDMA port unification.  NFSRDMA 
and RDS are two.  But user applications like mvapich2 and other mpis 
often let the stack choose a local port number on-which to bind/listen.

Would you reconsider moving the tcp/rdma port unification changes up 
into librdmacm?  The benefit is that this will resolve the issue in a 
manner that can flow into the distros and not affect the linux kernel.  
So librdmacm could, if configured to support this,  just allocate and 
bind a user socket to reserve the TCP port on behalf of the rdma 
application.  The code would be similar to the kernel patch...

Thoughts?

Thanks,

Steve.