This change requires that the cman package also be updated to the most recent version in order for the cluster infrastructure to work. If the package is not updated, you will see the following gfs_controld error messages in the log file:
gfs_controld: /proc/misc: No entry
for lock_dlm_plock found
gfs_controld: Is dlm missing from
The cman package related bugzilla is bug 450169.