netdev - Re: WARNING: at net/sched/sch_generic.c:219 dev_watchdog+0xfe/0x17e() with tg3 network

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20081125053128.GA32426@1wt.eu>
Date:	Tue, 25 Nov 2008 06:31:28 +0100
From:	Willy Tarreau <w@....eu>
To:	Matt Carlson <mcarlson@...adcom.com>
Cc:	Roger Heflin <rogerheflin@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: WARNING: at net/sched/sch_generic.c:219 dev_watchdog+0xfe/0x17e() with tg3 network

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

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html