Some lustre stats that used to be in /proc now reside in debugfs.  This seems all for the better, but it looks like the lctl [get|set|list]_param commands were not updated to look for the values in the new location.  Since the lctl *_param functions are meant to make these kinds of moves transparent to users, we think it is important to have lctl look in debugfs as well.

For example, in going from 2.10 to 2.12, we noticed that 'llite.*.stats' seem to have disappeared (but really are just hiding in debugfs):

$ lctl get_param 'llite.*.stats'
error: get_param: param_path 'llite/*/stats': No such file or directory