From mboxrd@z Thu Jan 1 00:00:00 1970 From: Willy Tarreau Subject: Re: WARNING: at net/sched/sch_generic.c:219 dev_watchdog+0xfe/0x17e() with tg3 network Date: Tue, 25 Nov 2008 06:31:28 +0100 Message-ID: <20081125053128.GA32426@1wt.eu> References: <491E49AA.60407@gmail.com> <20081118065006.GC24654@1wt.eu> <20081120031101.GD26448@xw6200.broadcom.net> <20081120053746.GB15168@1wt.eu> <20081120184310.GB27712@xw6200.broadcom.net> <20081120212637.GB23844@1wt.eu> <20081120215318.GB27907@xw6200.broadcom.net> <20081124132744.GB24851@1wt.eu> <20081124215247.GA29696@1wt.eu> <20081125015223.GA9151@xw6200.broadcom.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Roger Heflin , Peter Zijlstra , LKML , netdev To: Matt Carlson Return-path: Received: from 1wt.eu ([62.212.114.60]:1382 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750745AbYKYFbi (ORCPT ); Tue, 25 Nov 2008 00:31:38 -0500 Content-Disposition: inline In-Reply-To: <20081125015223.GA9151@xw6200.broadcom.net> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, Nov 24, 2008 at 05:52:23PM -0800, Matt Carlson wrote: (...) > > tg3: eth0: transmit timed out, resetting > > tg3: DEBUG: MAC_TX_STATUS[0000000b] MAC_RX_STATUS[00000006] > > tg3: DEBUG: RDMAC_STATUS[00000000] WDMAC_STATUS[00000008] > > tg3: tg3_stop_block timed out, ofs=1400 enable_bit=2 > > tg3: tg3_stop_block timed out, ofs=c00 enable_bit=2 > > tg3: tg3_stop_block timed out, ofs=4c00 enable_bit=2 > > tg3: eth0: Link is down. > > tg3: eth0: Link is up at 100 Mbps, full duplex. > > tg3: eth0: Flow control is on for TX and on for RX. > > > > The ease with which I reproduce it here clearly indicates that this is > > related to the switch, probably just the fact that it is at 100 Mbps. > > Unfortunately this evening I must go, but I still have one 100 Mbps > > switch somewhere at home, I'll reproduce the same test ASAP in order > > to bisect the issue. > > > > Regards, > > Willy > > Does turning off flow control help at all? I have not tested but I will. I hope to be able to trigger the problem on other similar switches, because I'm only once a week connected to the culprit... Regards, Willy