From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1A08C433ED for ; Wed, 31 Mar 2021 13:36:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 843246196C for ; Wed, 31 Mar 2021 13:36:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235635AbhCaNfh (ORCPT ); Wed, 31 Mar 2021 09:35:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235314AbhCaNfN (ORCPT ); Wed, 31 Mar 2021 09:35:13 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B379CC061574 for ; Wed, 31 Mar 2021 06:35:12 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1lRb02-0003Bh-4u; Wed, 31 Mar 2021 15:35:10 +0200 Date: Wed, 31 Mar 2021 15:35:10 +0200 From: Florian Westphal To: Phil Sutter , Pablo Neira Ayuso , Florian Westphal , netfilter-devel@vger.kernel.org Subject: Re: iptables-nft fails to restore huge rulesets Message-ID: <20210331133510.GF17285@breakpoint.cc> References: <20210331091331.GE7863@orbyte.nwl.cc> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210331091331.GE7863@orbyte.nwl.cc> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Phil Sutter wrote: > Hi, > > I'm currently trying to fix for an issue in Kubernetes realm[1]: > Baseline is they are trying to restore a ruleset with ~700k lines and it > fails. Needless to say, legacy iptables handles it just fine. > > Meanwhile I found out there's a limit of 1024 iovecs when submitting the > batch to kernel, and this is what they're hitting. > > I can work around that limit by increasing each iovec (via > BATCH_PAGE_SIZE) but keeping pace with legacy seems ridiculous: > > With a scripted binary-search I checked the maximum working number of > restore items of: > > (1) User-defined chains > (2) rules with merely comment match present > (3) rules matching on saddr, daddr, iniface and outiface > > Here's legacy compared to nft with different factors in BATCH_PAGE_SIZE: > > legacy 32 (stock) 64 128 256 > ---------------------------------------------------------------------- > 1'636'799 1'602'202 - NC - - NC - - NC - > 1'220'159 302'079 604'160 1'208'320 - NC - > 3'532'040 242'688 485'376 971'776 1'944'576 Can you explain that table? What does 1'636'799 mean? NC?