Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759955AbZD1Hma (ORCPT ); Tue, 28 Apr 2009 03:42:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760662AbZD1HmM (ORCPT ); Tue, 28 Apr 2009 03:42:12 -0400 Received: from sovereign.computergmbh.de ([85.214.69.204]:39220 "EHLO sovereign.computergmbh.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760653AbZD1HmK (ORCPT ); Tue, 28 Apr 2009 03:42:10 -0400 Date: Tue, 28 Apr 2009 09:42:09 +0200 (CEST) From: Jan Engelhardt To: Linus Torvalds cc: Stephen Hemminger , Ingo Molnar , Peter Zijlstra , Mathieu Desnoyers , Eric Dumazet , David Miller , Jarek Poplawski , Paul Mackerras , paulmck@linux.vnet.ibm.com, Evgeniy Polyakov , kaber@trash.net, jeff.chua.linux@gmail.com, laijs@cn.fujitsu.com, r000n@r000n.net, linux-kernel@vger.kernel.org, netfilter-devel@vger.kernel.org, netdev@vger.kernel.org, benh@kernel.crashing.org Subject: Re: [PATCH] netfilter: use per-CPU r**ursive lock {XV} In-Reply-To: Message-ID: References: <20090423210938.1501507b@nehalam> <49F146FF.5050200@cosmosbay.com> <20090424091839.6e13ebec@nehalam> <49F22465.80305@gmail.com> <20090425133052.4cb711f5@nehalam> <49F4A6E3.7080102@cosmosbay.com> <20090426185646.GB29238@Krystal> <20090426145746.1184aeba@nehalam> <1240854297.7620.65.camel@twins> <20090427113010.5e3f1700@nehalam> <20090427185423.GC23862@elte.hu> <20090427120658.35a858bb@nehalam> User-Agent: Alpine 2.00 (LSU 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1534 Lines: 33 On Monday 2009-04-27 21:46, Linus Torvalds wrote: >Clue bat #3 [sic #4]: > > - if you do not understand the difference between these two things, don't > then try to claim that somebody _else_ who does understand it is > "deluding himself". > > Analogy time: Ethernet and a modem line can both get you on the > internet. Now, let's say that Mr Peter Paste-Eater has heard of > ethernet, and knows you can get on the internet with an ethernet > connection, but he happens to use a modem line to do it. > > Now, Peter Paste-Eater talks to you, and tells you he is connecting to > the internet with ethernet, and proudly shows you his serial line and > modem, and tells you how he uses ethernet to get onto the internet. You > correct him, and tell him it's not ethernet. He argues for several > days about how he gets on the internet, and that it must thus be > ethernet, and that you're obviously just "deluding yourself". > >Now, can you see why people react badly to you talking about "recursive >locks"? You're acting like Peter Paste-Eater calling his serial line >ethernet. It could be worse. He could be running Ethernet over serial, e.g. L2TP. Or his serial line is a TP cable with RJ45 plugs - consumers like to call that Ethernet (cable) too. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/