rdtgroup_add_files
ret = rdtgroup_add_files(kn_subdir2, RFTYPE_ASSIGN_CONFIG);
ret = rdtgroup_add_files(kn_subdir, fflags);
ret = rdtgroup_add_files(kn_info, RFTYPE_TOP_INFO);
ret = rdtgroup_add_files(rdtgroup_default.kn, flags);
ret = rdtgroup_add_files(kn, files);