Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755170Ab1EDTDn (ORCPT ); Wed, 4 May 2011 15:03:43 -0400 Received: from s040.panelboxmanager.com ([72.55.186.60]:52862 "EHLO s040.panelboxmanager.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754848Ab1EDTDm (ORCPT ); Wed, 4 May 2011 15:03:42 -0400 Message-ID: <4DC1A2F1.80507@techboom.com> Date: Wed, 04 May 2011 15:03:13 -0400 From: TB User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.14) Gecko/20110223 Thunderbird/3.1.8 MIME-Version: 1.0 To: Randy Dunlap CC: Stephen Hemminger , netdev , linux-kernel@vger.kernel.org Subject: Re: Divide error in bictcp_cong_avoid ? References: <4DC178D3.6030308@techboom.com> <20110504104940.cd0d9e9a.rdunlap@xenotime.net> <20110504113351.4643a0c9@nehalam> <20110504113521.3c506a54.rdunlap@xenotime.net> In-Reply-To: <20110504113521.3c506a54.rdunlap@xenotime.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - s040.panelboxmanager.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - techboom.com X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1450 Lines: 49 On 11-05-04 02:35 PM, Randy Dunlap wrote: > 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 "<<<<<<<<<<<". /proc/sys/net/ipv4/tcp_available_congestion_control cubic reno cat /proc/sys/net/ipv4/tcp_congestion_control cubic -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/