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

[Sean Hefty]

>As for enabling this always on librdmacm, this can't work - since it will break
>IB user space app that attempts to open two listeners:

I thought about that, but didn't know whether it was in use.  I agree that
existing apps shouldn't break.  (I was thinking more along the lines of adding a
new call that would make this behavior explicit, but haven't taken the time to
really study the details.)

>one on SID(PS_TCP, X) - for example for X=3260 and the app being the Linux stgt
>target. Also Steve has mentioned earlier on this thread that kernel apps are
>safe from this problem - I am not sure this is the case for Lustre.

Does anyone know if a kernel patch to fix this has been accepted directly into
the distros?

Also, does anything keep MPI from doing exactly what we're discussing in the
application as part of using the librdmacm?  (Besides having all apps duplicate
this.)

- Sean