[ovs-discuss] kernel panic when setting QoS parameters more than once

Joe Stringer joe at ovn.org
Thu Jan 12 18:27:33 UTC 2017

On 12 January 2017 at 02:00, Riccardo R. <riccardoravaioli at gmail.com> wrote:
> Hi Joe,
> In my first message I forgot to say that the interface on which to run the
> command must be an existing interface, not a dummy one as in my example.
> Anyways, I recently tried on a 4.8 kernel and the problem disappeared. For
> easiness I used the version of openvswitch that I already had in the system,
> that is 2.4. I strongly suspect that it's a problem with kernel 4.6,
> independently of the version of openvswitch.

Yes, the backtrace confirms it's a bug in the Linux TC code; you
probably don't even need OVS to reproduce this issue.

If this has been fixed on newer kernels, I would suggest upgrading
hosts with that kernel to something newer. Linux 4.6 is now end of

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