[openib-general] gen2/rnic-pi differences

[Sean Hefty]

Caitlin Bestler wrote:
> And while I believe that we should *allow* consumers to use the
> core layer directly, I do not believe we should *encourage* it.
> Middleware layers such as DAPL, IT-API or an MPI messaging
> system are enable the application to focus on application issues
> rather than on wire issues. That's why kDAPL has been used,
> and why we should be concerned with enabling efficient middleware
> even if we allow consumers to bypass it.

The core layer should be designed to encourage, not discourage, its use, 
otherwise it has the wrong abstraction.

- Sean