V_pf_sources_z
uma_zfree(V_pf_sources_z, sn);
(*sn) = uma_zalloc(V_pf_sources_z, M_NOWAIT | M_ZERO);
V_pf_sources_z = uma_zcreate("pf source nodes",
V_pf_limits[PF_LIMIT_SRC_NODES].zone = V_pf_sources_z;
uma_zone_set_max(V_pf_sources_z, PFSNODE_HIWAT);
uma_zone_set_warning(V_pf_sources_z, "PF source nodes limit reached");
uma_zdestroy(V_pf_sources_z);
V_pf_status.src_nodes = uma_zone_get_cur(V_pf_sources_z);