[ofa-general] [PATCH 3/4] rdma/cm: add ability to specify typeofservice

[Sean Hefty]

>The point is that the SID and QoS Class (ala DiffServ class coming from
>TOS) are written to different fields of the QoS aware PR:
>* SID is written into the PR new SID field.
>* The QoS Class coming from the socket option gets into the QoSClass
>field.
>
>To select the QoS level the policy on the SM/SA might use both fields,
>one of the fields or none of the fields.
>But this is what policy is all about.

I understand, but we need to determine the policy on the host as well.
 
Does rdma_set_service_type() indicate that the app doesn't want its SID used
with the query, or does it merely convey additional restrictions?

I was leaning towards always including the SID with the PR query, but I want to
understand the consequences of doing so.  The result is that it gives all of the
policy to the SA.  Does anyone disagree with this approach?

- Sean