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

[Sean Hefty]

Michael S. Tsirkin wrote:
> It is somewhat unfortunate that we are duplicating the SA logic
> at the endnode in kernel memory here - current sa module has
> the advantage in that it just packs all data into a mad and sends it out.
> Something to think about.

What alternative do you propose?  The SA does reference counting on a per port 
basis, so joins must be handled locally.  How can you avoid duplicating that logic?

If a user truly only wants to query for an existing group, those requests must 
still go to the SA.

- Sean