I'm currently having a look into the debugging posibilities of my SLES11SP3 setup with pacemaker and ocfs2. The problem I ran into is, that the manpage of ocfs2 mentions in the "DLM Debugging" section the sysfs path "/sys/kernel/debug/o2dlm/<uuid>/dlm_state" to be usefull, but the folder "o2dlm" is missing on my nodes.
Furthermore, using debugfs.ocfs2 the "dlm_locks" command shows the following output (the filesystem is mounted!)
To me this looks somehow related, though I'm not sure.
debugfs: dlm_locks <M0000000000000000ac......
Could not open debug state for "C63DB913D6......".
Perhaps that OCFS2 file system is not mounted?
Does anyone have an idea how to enable this o2dlm in sysfs?