Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753469Ab0BUWSd (ORCPT ); Sun, 21 Feb 2010 17:18:33 -0500 Received: from alternativer.internetendpunkt.de ([88.198.24.89]:41421 "EHLO geheimer.internetendpunkt.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753180Ab0BUWSc (ORCPT ); Sun, 21 Feb 2010 17:18:32 -0500 Date: Sun, 21 Feb 2010 23:18:29 +0100 From: Hagen Paul Pfeifer To: Pavel Machek Cc: Andreas Petlund , "netdev@vger.kernel.org" , Ilpo J?rvinen , Eric Dumazet , Arnd Hannemann , LKML , shemminger@vyatta.com, David Miller , william.allen.simpson@gmail.com, damian@tvk.rwth-aachen.de, "Eric W. Biederman" Subject: Re: [net-next PATCH v4 1/3] net: TCP thin-stream detection Message-ID: <20100221221829.GX2659@nuttenaction> References: <4B7AAE60.3070305@simula.no> <20100221102102.GB1311@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100221102102.GB1311@ucw.cz> X-Key-Id: 98350C22 X-Key-Fingerprint: 490F 557B 6C48 6D7E 5706 2EA2 4A22 8D45 9835 0C22 X-GPG-Key: gpg --recv-keys --keyserver wwwkeys.eu.pgp.net 98350C22 User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1032 Lines: 25 * Pavel Machek | 2010-02-21 11:21:03 [+0100]: >> +1) If the stream is thin, fast retransmit on the first dupACK. >> +2) If the stream is thin, do not apply exponential backoff. > >2) seems very dangerous/unfair. If network congestion is caused just >by thin streams, will the network just fall apart? I question the fairness of this modification! The modification sounds _really_ far-reaching. Did you analyse the behaviour of this modification? What about fairness analysis? Great work is available in the network simulator sector for this kind of analysis (e.g. jain's fairness index). HGN -- Hagen Paul Pfeifer || http://jauu.net/ Telephone: +49 174 5455209 || Key Id: 0x98350C22 Key Fingerprint: 490F 557B 6C48 6D7E 5706 2EA2 4A22 8D45 9835 0C22 -- 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/