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    SubjectRE: 3.6.10: Intel: ixgbe 0000:01:00.0 eth4: Detected Tx Unit Hang
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    -----Original Message-----
    From: devendra.aaru [mailto:devendra.aaru@gmail.com]
    Sent: Monday, December 17, 2012 1:39 PM
    To: Justin Piszcz
    Cc: linux-kernel@vger.kernel.org; netdev@vger.kernel.org
    Subject: Re: 3.6.10: Intel: ixgbe 0000:01:00.0 eth4: Detected Tx Unit Hang

    Ccing netdev
    On Sat, Dec 15, 2012 at 10:49 AM, Justin Piszcz <jpiszcz@lucidpixels.com>
    wrote:
    > Hello,
    >
    > Kernel 3.6.10, first time I have seen this that I can remember (on 10GbE)
    > anyway, is this a known issue with 3.6.10?
    >
    > When the link went down is when I rebooted/etc the remote host attached on
    > the other end.
    > I've not changed anything physically with the hardware and have been on
    > 3.6.0-3.6.9 and noticed this when I moved to 3.6.10.

    --

    > I don't believe we have seen Tx hangs in validation. If you could narrow
    down the conditions that lead to the Tx hang that would help a lot. Also
    > the output of ethtool -S eth4 after the Tx hang occurs can be useful to
    get an idea of the load on the interface.

    > Thanks,
    > Emil

    --

    In this case I only have two servers that mount each other's NFS volumes and
    that were idle at the time, I rebooted one of the systems and that is when I
    saw this, if I can get something to repeat/pattern and/or the ethtool output
    I will update this thread, thank you.

    Justin.



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