[openib-general] IB mcast question

[Steve Wise]

> > 
> > Only the first join request should make it to the SA.  The second join request 
> > is fulfilled by ib_multicast.  This is what makes ib_multicast suspect.
> 
> 
> I'll look into this module...
> 

ib_multicast takes care of sending the join/leave info to the SA, right?
It keeps track of _when_ to leave, for instance.  So since opensm -is-
getting the join and setting up the group, and the mcast packet is being
passed to the first member who joined, then I don't think ib_multicast
can mess up the subsequent members, can it?  

I confirmed that mthca was called to attach both qps to the mgid/mlid,
so this makes me think ib_multicast worked ok. 

I'm new to IB mcast, so I'm learning, but it seems like the mthca
firmware maybe isn't doing the right thing here.  

Any suggestions on how to further debug this? 

BTW my HCAs are at the latest firmware.  I just had them upgraded.

Steve.