[openib-general] [RFC] [PATCH 2/7] ib_multicast 2.6.20: add ib_multicast module to track join requests from the same port

[Eitan Zahavi]

Hi Or,

Maybe I did not explain myself right.
The idea is not to implement it in the mad.c code but rather to 
implement it at the lowest level:
The problem with a new API is that a single ULP/applications which does 
direct umad or QP1 access will break the reference count.

Implementing at the lowest level - I.e. by sniffing QP1 packets - would 
be enforced for all applications/ULPs.

Or Gerlitz wrote:
> Eitan Zahavi wrote:
>   
>> If the tracking (ref counting) was done at the MAD level - no change to 
>> IPoIB would have been required ...
>>     
>
> Maybe.
>
> You could also implement all the ib stack core in one module...
> The openib designers have chosen not to do so and rather break it into 
> smaller modules namely ib_core, ib_mad, ib_sa, ib_cm, ib_addr and 
> rdma_cm, with the architecture at hand adding ib_multicast makes sense.
>
> Or.
>
>
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