netdev - Re: atl1: WARNING at net/sched/sch

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Date:	Wed, 17 Sep 2008 11:44:46 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Jay Cliburn <jacliburn@...lsouth.net>
Cc:	csnook@...hat.com, netdev@...r.kernel.org
Subject: Re: atl1: WARNING at net/sched/sch_generic.c:221

On Mon, Sep 15, 2008 at 08:44:31PM -0500, Jay Cliburn wrote:
> On Tue, 16 Sep 2008 02:45:22 +0400
> Alexey Dobriyan <adobriyan@...il.com> wrote:
> 
> > On Sun, Sep 14, 2008 at 06:17:14PM -0500, Jay Cliburn wrote:
> > > On Thu, 21 Aug 2008 15:58:49 +0400
> > > adobriyan@...il.com wrote:
> > > 
> > > > This message happens more or less every reboot, sometimes cable
> > > > unplug/plug is needed to restore connectivity, otherwise card is
> > > > working fine.
> > > > 
> > > > 
> > > > [   22.570010] eth1: link up, 100Mbps, full-duplex, lpa 0x45E1
> > > > [   26.570011] NET: Registered protocol family 10
> > > > [   37.551934] eth0: no IPv6 routers present
> > > > 
> > > > 	[rebooted box which is directly connected to a box with
> > > > atl1]
> > > > 
> > > > [ 2078.740004] atl1 0000:03:00.0: eth0 link is down
> > > > [ 2080.790004] atl1 0000:03:00.0: eth0 link is up 1000 Mbps full
> > > > duplex [ 2086.049998] NETDEV WATCHDOG: eth0 (atl1): transmit
> > > > timed out [ 2086.050004] ------------[ cut here ]------------
> > > > [ 2086.050004] WARNING: at net/sched/sch_generic.c:221
> > > [...]
> > > 
> > > Alexey,
> > > 
> > > Can you please try this patch?
> > 
> > Seems to help (no more messages), still sometimes no networking until
> > after cable replug. Stay tuned.
> 
> Does this stay tuned mean, "Jay, hold off while I (Alexey) troubleshoot
> this further."  Or does it mean, "Jay, you've not completely solved the
> problem yet and you need to continue working on it."

I don't know.

Transmit timeout messages definitely dissapeared, no network until cable
replug a) happened earlier, b) much more rare than transmit timeouts.

> If it's the latter, can you please describe your setup and how you reproduce
> the problem?  Is the box you have connected directly to the atl1 box used
> as a netconsole?

atl1 netconsoles to r8169, connected directly without any switches.

It usually happens after one of the boxes reboots (well, obviously)
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