[Bug 659258] Re: Infiniband/RDMA rules absent

[Roland Dreier]

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.

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https://bugs.launchpad.net/bugs/659258

Title:
  Infiniband/RDMA rules absent

Status in udev - /dev/ management daemon:
  New
Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: udev

  Ubuntu release: 10.10, amd64
  udev version: 162-2

  After upgrading from 10.04 to 10.10 the udev rules for Infiniband /
  RDMA device nodes have vanished, rendering all applications that rely
  on their presence (in short: the infiniband / RDMA stack)
  dysfunctional.

  Manually adding the 40-infiniband.rules file from 10.04 works around
  the issue.

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