netdev - Re: niu lock-up (Transmit timed out, resetting) and NETDEV WATCHDOG

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Message-ID: <CAHOfOo0kdByd3T0LL4tBpy-aFtJS6bRK7D=rPc6Si0iv03CLKQ@mail.gmail.com>
Date:	Mon, 24 Jun 2013 11:20:15 +0100
From:	Andrew Brooks <arb@....dundee.ac.uk>
To:	Linux Net-Dev Mailing List <netdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: niu lock-up (Transmit timed out, resetting) and NETDEV WATCHDOG

On 26 March 2013 13:44, Andrew Brooks <arb@....dundee.ac.uk> wrote:
>
> Using niu driver for this card: Oracle/SUN Multithreaded 10-Gigabit
> Ethernet Network Controller and after a period the interface will hang
> with errors every 5 seconds
> "niu: xxx: eth2: Transmit timed out, resetting"
>
> Sometimes also in syslog are messages
> WARNING: at sch_generic:255 dev_watchdog
> NETDEV WATCHDOG: eth2 (niu): transmit queue 10 timed out

Do you think this could be caused by a problem I've seen reported
by other machines on the network
"received unsolicited ack for DL_UNITDATA_REQ on nxge0" ?
Is there some bad packet flying around that causes the
niu driver to lock up the kernel?
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