From mboxrd@z Thu Jan 1 00:00:00 1970 From: Randy Dunlap Subject: Re: Divide error in bictcp_cong_avoid ? Date: Wed, 4 May 2011 11:35:21 -0700 Message-ID: <20110504113521.3c506a54.rdunlap@xenotime.net> References: <4DC178D3.6030308@techboom.com> <20110504104940.cd0d9e9a.rdunlap@xenotime.net> <20110504113351.4643a0c9@nehalam> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: TB , netdev , linux-kernel@vger.kernel.org To: Stephen Hemminger Return-path: In-Reply-To: <20110504113351.4643a0c9@nehalam> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Wed, 4 May 2011 11:33:51 -0700 Stephen Hemminger wrote: > On Wed, 4 May 2011 10:49:40 -0700 > Randy Dunlap 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 *** Remember to use Documentation/SubmitChecklist when testing your code ***