From mboxrd@z Thu Jan 1 00:00:00 1970 From: ookhoi@humilis.net Subject: why does netfilter make upload very slow? (was: Re: e1000 -> 82540EM on linux 2.6.0-test[45] very slow in one direction) Date: Wed, 8 Oct 2003 15:13:20 +0200 Sender: netdev-bounce@oss.sgi.com Message-ID: <20031008131320.GD16964@favonius> Reply-To: ookhoi@humilis.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: To: linux-kernel@vger.kernel.org, netdev@oss.sgi.com Content-Disposition: inline Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.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 :-)