Hello! > So, for the record, is 44 seconds on a high-end machine acceptable > for ifconfig -a on 4000 interfaces? You know my opinion about this. I would not be drowned in tears even if it did not finish for hour. :-) BTW ifconfig -a does not use dev_get_by_index() at all, so that... Alexey - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html