Comment 5 for bug 659258

FWIW, on my Oneiric system, I did "modprobe rdma_ucm" and I see:

$ ls -l /dev/infiniband/
total 0
crw-rw-rw- 1 root root 10, 57 2011-11-07 10:34 rdma_cm

so with kernel 3.0 or newer, things work as expected.

(You can try this with a system that doesn't have any RDMA hardware)

As far as I know, this bug is only an issue on Natty and older.