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Date: Tue, 28 Apr 2009 09:42:09 +0200 (CEST) From: Jan Engelhardt <jengelh@...ozas.de> To: Linus Torvalds <torvalds@...ux-foundation.org> cc: Stephen Hemminger <shemminger@...tta.com>, Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>, Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>, Eric Dumazet <dada1@...mosbay.com>, David Miller <davem@...emloft.net>, Jarek Poplawski <jarkao2@...il.com>, Paul Mackerras <paulus@...ba.org>, paulmck@...ux.vnet.ibm.com, Evgeniy Polyakov <zbr@...emap.net>, kaber@...sh.net, jeff.chua.linux@...il.com, laijs@...fujitsu.com, r000n@...0n.net, linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org, netdev@...r.kernel.org, benh@...nel.crashing.org Subject: Re: [PATCH] netfilter: use per-CPU r**ursive lock {XV} 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 netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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