kstat_kv_bool
kstat_kv_bool(&tzk->tzk_cooling) = (tz->tz_cm != NULL);
kstat_kv_bool(&tzk->tzk_cooling) = 0;
kstat_kv_bool(&pk->selected) = p->p_selected == AGGR_PORT_SELECTED;
kstat_kv_bool(&kd->kd_oactive) = ifq->ifq_oactive;
printf("%s", kstat_kv_bool(kv) ? "true" : "false");