[openib-general] Fwd: IPoIB Multicast

[Roland Dreier]

    Michael> Works OK here. Please commit. Please note this does fix a
    Michael> real issue for us, which is quite severe for clusters
    Michael> where ipoib is the only interconnect, I wander whether
    Michael> this is 2.6.18 material.

I don't understand why this is a big problem.  What breaks if we let
OpenSM pick the MTU and Rate for a new multicast group?  It's already
picking them for the broadcast group.

Anyway I put this in my for-2.6.19 branch for now.

 - R.