From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261476AbTJHNNW (ORCPT ); Wed, 8 Oct 2003 09:13:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261486AbTJHNNW (ORCPT ); Wed, 8 Oct 2003 09:13:22 -0400 Received: from ookhoi.xs4all.nl ([213.84.114.66]:35992 "EHLO favonius.humilis.net") by vger.kernel.org with ESMTP id S261476AbTJHNNV (ORCPT ); Wed, 8 Oct 2003 09:13:21 -0400 Date: Wed, 8 Oct 2003 15:13:20 +0200 From: ookhoi@humilis.net To: linux-kernel@vger.kernel.org, netdev@oss.sgi.com Subject: why does netfilter make upload very slow? (was: Re: e1000 -> 82540EM on linux 2.6.0-test[45] very slow in one direction) Message-ID: <20031008131320.GD16964@favonius> Reply-To: ookhoi@humilis.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Uptime: 12:10:55 up 120 days, 12:12, 37 users, load average: 2.11, 2.02, 2.46 User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ookhoi wrote (ao): # Ookhoi wrote (ao): # > Florian Zwoch wrote (ao): # > > issue seems to partly solved. the e1000 driver seems to be ok! # > > i reconfigured my kernel and intentionally left out netfilter options. # > > after that my network performance was back to normal. # > > # > > netfilter was only compiled in the kernel. it was not used with any rules! # > > # > > so my wild guess would be that something with the netfilter code (i am # > > not 100% sure it was netfilter.. _maybe_ it was some small odd kernel # > > option i accidently enabled/disabled) is broken since test3 (again # > > uncertified. but i firstly noticed this switching from test3 to test4). # # > I have netfilter enabled, and will try another -test6 kernel with # > netfilter not compiled in to see if that indeed makes a difference. # # I can confirm now that disabling netfilter in 2.6.0-test6 makes the nic # perform oke wrt upload. # I (just like Florian) had no iptables rules active in the former # 2.6.0-test6 kernel, but netfilter was compiled in. Would somebody like to explain why netfilter (in kernel, but not in use) makes upload go very slow? I am by no means a network guru, but eager to learn :-)