netdev - Re: divide error: 0000, in bictcp_cong

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Message-ID: <20110705101618.744bbab0@nehalam.ftrdhcpuser.net>
Date:	Tue, 5 Jul 2011 10:16:18 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	TB <lkml@...hboom.com>
Cc:	netdev@...r.kernel.org
Subject: Re: divide error: 0000, in bictcp_cong_avoid, kernel 2.6.39

On Mon, 04 Jul 2011 14:10:16 -0400
TB <lkml@...hboom.com> wrote:

> On 11-07-04 01:36 PM, Stephen Hemminger wrote:
> > Any data about the type of connection, kernel configuration or other
> > information that might be useful in reproducing the problem?
> > 
> > Also please try 2.6.39.2
> 
> We haven't found a sure way of reproducing it.
> It happened on 1.2% of our servers over the weekend and seems random.
> Both are connected with 2 gigabit ports using bonding. Traffic tends to
> be heavy, but doesn't seem to be a factor.
> 
> Would a .config help ?
> 
> Only the very basic filter module for iptables is compiled in.
> 
> We will try 2.6.39.2 soon

Kernel config (and compiler version) would help in identifying which
of the three divides is getting divide by zero.
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