David Miller wrote:
quoted text
> From: David Miller <davem@davemloft.net>
> Date: Fri, 01 Aug 2008 18:03:37 -0700 (PDT)
>
>> Looks like two threads are accessing the qdisc SKB lists but one of
>> them isn't taking the proper qdisc locks.
>>
>> I can't see how this can happen currently but I'll try to figure it
>> out.
>
> I see what's going on.
>
> Once we decide on a root qdisc to process, we shouldn't use
> qdisc_root_lock() since that will resample qdisc->dev_queue->qdisc
> which might be different.
>
> This points out a core problem, and I might need to add a
> root_qdisc backpointer to struct Qdisc to make this all work
> out sanely for all cases.
>
> Anyways, please try this patch:

Still panics. Survived few MTU changes, but eventually I got this (see atta=
ched file - sorry for the partial dump, but that's all I can do remotely).

Thanks,
Emil