Subject: Re: Divide error in bictcp_cong_avoid ?

From: [email-masked]
Date: Wed, 04 May 2011 15:31:21 -0400

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,