[openib-general] IB mcast question

[Steve Wise]

On Mon, 2006-08-14 at 13:33 -0700, Sean Hefty wrote:
> Steve Wise wrote:
> > So is this replicating done in the mthca hca?  
> 
> As just an FYI, I didn't see anything wrong in the mthca driver either when I 
> was looking at this problem.
> 

Ok.  I added printks in the mcast attach/detach and they're firing as
expected:

vic18:/home/swise/zip # dmesg
mthca_multicast_attach qp_num 406 gid ff124001ffff0000:00000000000a0aff lid c003
mthca_multicast_attach qp_num 407 gid ff124001ffff0000:00000000000a0aff lid c003
mthca_multicast_detach qp_num 406 gid ff124001ffff0000:00000000000a0aff lid c003
mthca_multicast_detach qp_num 407 gid ff124001ffff0000:00000000000a0aff lid c003


> > Should the SM get join requests for both applications that join the
> > group on the same host?  Or only the first one?
> 
> 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...

Thanks,

Stevo.