[ewg] RE: [ofa-general] [PATCH 0/9] RDMAoE - RDMA over Ethernet

[Sean Hefty]

>LL: the RDMA stack will see that the port has different link types.
>SLs map cleanly to VLAN user priorities.

>LL: you need to emulate *enough* so that typical applications don't need
>to worry about the link type. SA path queries is the best example.
>Otherwise, every RDMA application (not necessarily a CMA app) will need
>to have different code paths depending on the link type.

Let's just say that at this point I completely disagree with where these patches
try to abstract the differences, which are many.

RDMA apps that want to use this and IB without going through an abstraction will
need different code -- just like they would for iWarp, which also provides RDMA
over Ethernet, and is a standard.  IB mad and SA query modules are not
appropriate places for abstracting the differences between IB, iWarp, and
whatever name we give this.

This could change depending on whether this is really trying to be IB with a
different L2, or is just another RDMA protocol that runs on Ethernet.

- Sean