[ofa-general] [PATCH][RFC] Handle packet received on RQ of tx_qp with NOSRQ

[Pradeep Satyanarayana]

Roland Dreier wrote:
>  > I thought a cleaner solution (and better performing) would be to implement a separate 
>  > CQ and handler. Could you explain your reservations to this approach?
> 
> We want to have all completion handling go through the NAPI poll
> routine to avoid having the system collapse under high interrupt load.
> 
I purposely chose not to use NAPI. In fact I also chose not to use scatter-
gather lists for the skbs (of the rq of tx_qp), because I believe this 
really is a corner case. There hasn't been a strong requirement for heterogeneous
OS support.

When SRQ will be supported on the IBM HCA, there will be no need for this.

I am implementing this only for completeness sake and want to do it with minimal 
effort. Given the above, do you still see it necessary to use NAPI?

Is it acceptable that I roll up the previous NOSRQ patches (other than this one) into 
a single patch and can that one be integrated first?

We can deal with this one after that. The corner case one is holding up the main patch
and I would like to find a way to get the main patch in ASAP.

Pradeep