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

[Pradeep Satyanarayana]

Roland Dreier wrote:
>> This is only for completeness sake. Performance will be poor compared to two (or more)
>> Linux systems using this. This is expected to be really a corner and do not expect this
>> to happen. Hence is there for completeness only. If I interpreted this correctly, this 
>> is was what Roland suggested (and I agree with the suggestion).
> 
> No, this isn't really what I suggested.  I suggested one receive to
> start with, and if this receive is consumed, then post a full set of
> receives to fill the QP receive queue and use it normally.  No
> separate CQ, no kernel log message.  This still might run into RNR
> issues if more than one message is sent right away.
> 
> I woudn't be that surprised if AIX or Solaris or some other OS chooses
> to use the same QP for sending and receiving, and I'm not sure we want
> to be in a situation where that doesn't work well.  Although maybe we
> can defer worrying about this until someone runs into the issue in
> practice.
> 
> I guess you should post your latest rolled up patch sowe can see where
> we stand on this.
> 

Without a separate CQ, how do the receive work completion handlers distinguish 
between the different receive queues of rx_qp and tx_qp  -any suggestions?

Pradeep