[openib-general] Re: [PATCH] ib_mad: prevent duplicateoutstanding MADtransactions with same TID

[Michael S. Tsirkin]

Quoting r. Sean Hefty <mshefty at ichips.intel.com>:
> Subject: Re: [PATCH] ib_mad: prevent duplicateoutstanding MADtransactions with same TID
> 
> >I dont see a way around this: the dirt is at the spec level.
> 
> Correct - I believe this is an architectural issue that needs to be 
> addressed by changes to the spec.

Okay. But, note this affects ACKs as well as ABORTs (with multi-packet
requests):

Host A sends an RMPP request message to host B with TID=3
Host B sends an RMPP request message to host A with TID=3.
Now if A generates an RMPP response it has TID=3.

If B sends ACK, host A has no idea which transaction is being ACKed.

What kind of spec change do you envision?

-- 
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies