[openib-general] oops with multicast patches

[Roland Dreier]

 > The user level application uses almost all of the multicast groups in the
 > machine. Only 1,2,3,4 mcgs (depends on the test case) are available for
 > the IPoIB to use: it start to attach (and maybe join) all the mcgs that it
 > needs and fails when it reaches the HCA mcgs limit.

Ohh... I see.

 > Maybe there is a problem with the multicast module when the attach to
 > multicast group verb fails?

I guess it would be in the ipoib driver error handling or how it
interacts with the multicast module, since the attach to multicast
happens in the ipoib driver, not the multicast module.

Sean, does this give you any ideas of what to look at?

 - R.