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Message-ID: <16668.1304537481@localhost>
Date: Wed, 04 May 2011 15:31:21 -0400
From: Valdis.Kletnieks@...edu
To: Stephen Hemminger <shemminger@...tta.com>
Cc: Randy Dunlap <rdunlap@...otime.net>, TB <lkml@...hboom.com>,
netdev <netdev@...r.kernel.org>, linux-kernel@...r.kernel.org
Subject: Re: Divide error in bictcp_cong_avoid ?
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,
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