linux-kernel - Re: Divide error in bictcp_cong

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Message-ID: <20110504113351.4643a0c9@nehalam>
Date:	Wed, 4 May 2011 11:33:51 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Randy Dunlap <rdunlap@...otime.net>
Cc:	TB <lkml@...hboom.com>, netdev <netdev@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Divide error in bictcp_cong_avoid ?

On Wed, 4 May 2011 10:49:40 -0700
Randy Dunlap <rdunlap@...otime.net> wrote:

> [add cc to netdev]
> 
> 
> On Wed, 04 May 2011 12:03:31 -0400 TB wrote:
> 
> > We're having this issue sporadically on a few servers and this is the 
> > backtrace we get from netconsole.
> > 
> > 
> > [28522.642419] divide error: 0000 [#1] SMP
> > [28522.642457] last sysfs file: 
> > /sys/devices/pci0000:00/0000:00:1f.2/host2/target2:0:0/2:0:0:0/vendor
> > [28522.642504] CPU 0
> > [28522.642511] Modules linked in:
> >   i2c_i801
> >   i2c_core
> >   evdev
> >   button
> > [28522.642570]
> > [28522.642590] Pid: 0, comm: swapper Not tainted 2.6.38.5 #6
> > 
> >   Supermicro X8DTH-i/6/iF/6F
> > /
> >   X8DTH
> > 

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.

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