Cman cannot start on kernel-rt

Solution Unverified - Updated -

Issue

  • A cman cannot start on kernel-rt.
    # /etc/init.d/cman start
Starting cluster: 
   Loading modules... failed
FATAL: Module lock_dlm not found.
                                                           [FAILED]

Environment

  • Red Hat MRG Realtime (any version)
  • Red Hat HA / Cluster Suite (any version)

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