[ewg] bug 1918 - openmpi broken due to rdma-cm changes

[Steve Wise]

Sean Hefty wrote:
>> But how can you determine _which_ rdma device should be used if and app
>> binds to 127.0.0.1?  I think this is busted...
>>     
>
> The code just picks the first rdma device available.  To me, this is preferable
> than simply disallowing the loopback device from working at all.  I personally
> use it all the time, so I don't have to figure out what the ip address is of the
> system that I'm trying to test on.
>   

Well then the rdma-cm needs to know which devices support hw loopback.  
Cuz on a T3-only system, no hwloop...

Steve.