Herbert Xu wrote:

>Nuno Silva <nuno.silva@vgertech.com> wrote:
>  
>
>>The problem is in the QoS code. If I start ppp whithout the 
>>    
>>
>
>OK, this appears to be due to the changeset titled
>
>[PKT_SCHED]: Refcount qdisc->dev for __qdisc_destroy rcu-callback
>
>It adds a reference to dev.
>
>I don't see any code that cleans up that reference when the dev goes
>down.  So someone needs to add that similar to the code in net/core/dst.c.
>
>Patrick, could you please have a look at this?
>  
>
The reference is dropped in __qdisc_destroy. The problem lies in the CBQ
qdisc, it doesn't destroy the root-class and leaks the inner qdisc. These
two patches for 2.4 and 2.6 fix the problem.

Regards
Patrick