linux-kernel - Re: Divide error in bictcp_cong

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Message-Id: <20110504113521.3c506a54.rdunlap@xenotime.net>
Date:	Wed, 4 May 2011 11:35:21 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Stephen Hemminger <shemminger@...tta.com>
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 11:33:51 -0700 Stephen Hemminger wrote:

> 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.

Please see about 6 lines above.... at the "<<<<<<<<<<<".


---
~Randy
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