V_ipfw_cntr_zone
V_ipfw_cntr_zone = uma_zcreate("IPFW counters",
uma_zdestroy(V_ipfw_cntr_zone);
rule->cntr = uma_zalloc_pcpu(V_ipfw_cntr_zone, M_WAITOK | M_ZERO);
uma_zfree_pcpu(V_ipfw_cntr_zone, rule->cntr);