Hello, We hit a bug where nf_nat_cleanup_conntrack is taking exponential amount of time if you ping a lot of distinct IPs. It seems to be related to hlist -> rhlist migration. Here's the bugzilla ticket: * https://bugzilla.kernel.org/show_bug.cgi?id=196821 It has a reproduce script and the list of reverts that bring back reasonable performance. Dev mailing list seems like a good place to notify the right people. The first email got rejected because of html subpart, apologies for the duplicate. Thanks. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html