netdev - Fw: [Bug 56631] New: niu Sun Neptune 10G fiber card

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Date:	Mon, 15 Apr 2013 08:03:42 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	david miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Fw: [Bug 56631] New: niu Sun Neptune 10G fiber card - "transmit
 timed out"



Begin forwarded message:

Date: Mon, 15 Apr 2013 06:25:44 -0700
From: "bugzilla-daemon@...zilla.kernel.org" <bugzilla-daemon@...zilla.kernel.org>
To: "stephen@...workplumber.org" <stephen@...workplumber.org>
Subject: [Bug 56631] New: niu Sun Neptune 10G fiber card - "transmit timed out"


https://bugzilla.kernel.org/show_bug.cgi?id=56631

           Summary: niu Sun Neptune 10G fiber card - "transmit timed out"
           Product: Networking
           Version: 2.5
    Kernel Version: 3.9.0
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Other
        AssignedTo: shemminger@...ux-foundation.org
        ReportedBy: arb@....dundee.ac.uk
        Regression: Yes


[Ref. bug 10801 still not solved]

The system will hang with the message
"niu: xxx: eth2: Transmit timed out, resetting"
It will then remain hung with messages output every 5 seconds.

This has also been observed (but not every time):
WARNING: at sch_generic:255 dev_watchdog
NETDEV WATCHDOG: eth2 (niu): transmit queue xx timed out

Has been seen to occur in kernels 3.2, 3.5 and 3.9.
Hardware: "Sun Fire X2250" with "Oracle/SUN Multithreaded 10-Gigabit Ethernet
Network Controller (rev 01)"
Software: Ubuntu Precise 12.04.2 running as a NFS client

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