Often it happens that I know a specific parameter name exists, but I don't know the exact parameter name, like "brw_stats" is at "osd-ldiskfs.*.brw_stats" but it used to be at "obdfilter.*.brw_stats", while "brw_size" is still at "obdfilter.*.brw_size".

It would be useful to have an option like "lctl find_param PARAM" that is similar to "lctl list_param -R '*' | grep PARAM" to at least list the parameter names, or possibly also printing the value of these parameters by default, while allowing "-n" and "-N" arguments to to print only the pameter name or value, as needed. It should also be possible to use "--path|-p" to print the actual pathname instead of the formatted parameter name.