Bug#616441: linux-image-2.6.32-5-xen-686: NETDEV WATCHDOG: usb0 (cdc_subset): transmit queue 0 timed out

[Ben Hutchings <ben@decadent.org.uk>]

On Fri, Mar 04, 2011 at 03:44:04PM +0100, Ferenc Wagner wrote:
> Package: linux-2.6
> Version: 2.6.32-30
> Severity: minor
> 
> Hi,
> 
> usb0 is a "crosslink" between two such machines for heartbeat purposes.
> The below warning appeared when the node on the other end was executing
> a reboot, right after its heartbeat process (reading/writing the other
> end of the crosslink) shut down.  It does not happen on each such event,
> though, so I can't readily reproduce it, but if may be feasible if
> somebody knows what and how to press.  It hasn't got any obvious adverse
> effect on the operation of the machines.

This is quite possibly a hardware bug.  Does the driver successfully
recover after this warning?

You may find it easier to reproduce if you use the packet generator to
send a lot of traffic from machine 1 to machine 2 and the shut down
machine 2.  If that works to reproduce it then the next step would be
to test a more recent kernel version to find out whether it has been
fixed already.

If you cannot find a reliable reproducer, I'm afraid this is unlikely
to be fixed.

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus