[openib-general] APM support in openib stack

[Michael S. Tsirkin]

> > > >     + use IB PORT GIDs at your initial mpi init exchange
> > > >     + issue IB SA Path query via libibsa (which does not exist)
> > >
> > > likely multipath query if you want APM
> 
> > Yes, we want to have APM as well.
> 
> The RDMA CM is about to be enhanced to support IB APM where for now
> you would need to provide the alternate path from some "out of rdma
> cm" band means.

Are you working on this then? Cool.

> But in the future an enhancemnt of the IB SM would
> allow the RDMA CM to provide you with the alternate path as well.

Wouldn't we be able to do the necessary queries with existing SM?
I think the SM enhancement is only needed as an optimization, to
reduce the number of queries.

-- 
MST