FM_CACHE_INFO_ID
FM_CACHE_INFO_ID, DATA_TYPE_UINT64, &id,
alt_id = fnvlist_lookup_uint64(*cachep, FM_CACHE_INFO_ID);
FM_CACHE_INFO_ID, DATA_TYPE_UINT64, &id, NULL) != 0) {
fnvlist_add_uint64(caches[i], FM_CACHE_INFO_ID, c.xc_id);