[ofa-general] does the mlx4 low level driver support working with multicast groups from user level?

[Dotan Barak]

Hi Roland.

When i executed ibv_devinfo and checked the multicast props of the 
device i got the following values:

sw180:~ # ibv_devinfo -v | grep cast
    This will severely limit memory registrations.
        max_mcast_grp:                  8192
        max_mcast_qp_attach:            0
        max_total_mcast_qp_attach:      0

It seems that the IB low level driver (drivers/infiniband/hw/mlx4) 
doesn't fill the attribute max_mcast_qp_attach.

When i tried to use multicast groups from user level i got weird failures.


Does the low level driver support working with multicast groups from 
user level?


thanks
Dotan