Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755477Ab1EDTb1 (ORCPT ); Wed, 4 May 2011 15:31:27 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:36532 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754399Ab1EDTbZ (ORCPT ); Wed, 4 May 2011 15:31:25 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.3-dev To: Stephen Hemminger Cc: Randy Dunlap , TB , netdev , linux-kernel@vger.kernel.org Subject: Re: Divide error in bictcp_cong_avoid ? In-Reply-To: Your message of "Wed, 04 May 2011 11:33:51 PDT." <20110504113351.4643a0c9@nehalam> From: Valdis.Kletnieks@vt.edu References: <4DC178D3.6030308@techboom.com> <20110504104940.cd0d9e9a.rdunlap@xenotime.net> <20110504113351.4643a0c9@nehalam> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1304537481_7352P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Wed, 04 May 2011 15:31:21 -0400 Message-ID: <16668.1304537481@localhost> X-Mirapoint-Received-SPF: 198.82.161.152 auth3.smtp.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Mirapoint-IP-Reputation: reputation=neutral-1, source=Fixed, refid=n/a, actions=MAILHURDLE SPF TAG X-Junkmail-Status: score=10/50, host=steiner.cc.vt.edu X-Junkmail-Signature-Raw: score=unknown, refid=str=0001.0A020205.4DC1A98A.002A,ss=1,fgs=0, ip=0.0.0.0, so=2010-07-22 22:03:31, dmn=2009-09-10 00:05:08, mode=single engine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1340 Lines: 42 --==_Exmh_1304537481_7352P Content-Type: text/plain; charset=us-ascii On Wed, 04 May 2011 11:33:51 PDT, Stephen Hemminger said: > What kernel version? I suspect they are running something really old > kernel like RHEL 5 since BIC has not been the default congestion control for > several years. Pretty bleeding edge here, and BIC is *still* the default: % uname -a Linux turing-police.cc.vt.edu 2.6.39-rc5-mmotm0429 #1 SMP PREEMPT Sat Apr 30 00:36:49 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux % zgrep -i BIC /proc/config.gz CONFIG_TCP_CONG_BIC=y CONFIG_TCP_CONG_CUBIC=m CONFIG_DEFAULT_BIC=y CONFIG_DEFAULT_TCP_CONG="bic" Why? Because BIC was working "well enough", so I never changed it by hand, and "make oldconfig" never changed it automagically either. Now, --==_Exmh_1304537481_7352P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFNwamJcC3lWbTT17ARAr+6AKCdKmV8Bq6F2lh5wEq46/cyi4js6wCfXz40 wcMPCc17PaxksJCuEB56UdQ= =0NR+ -----END PGP SIGNATURE----- --==_Exmh_1304537481_7352P-- -- 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/