Sean> Ah - okay, I didn't realize that ipoib needed this. I
Sean> thought that it was doing this itself in order to attach the
Sean> multicast group to the QP and create the address handle.
Sean> (I've just started looking at the code in detail, so I could
Sean> easily be off on the operation.)
No, IPoIB doesn't need reference counting. But suppose IPoIB joins a
group and a userspace process also joins the group. When the
userspace process leaves, the port had better remain a member of the group.
- R.
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