On Wed, 2017-09-20 at 15:39 +0200, Paweł Staszewski wrote:
>
> W dniu 2017-09-20 o 15:34, Eric Dumazet pisze:
> > Could you try this debug patch ?
> >
> > diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> > index
> > f535779d9dc1dfe36934c2abba4e43d053ac5d6f..1eaa3553a724dc8c048f67b556337072d5addc82
> > 100644
> > --- a/include/linux/netdevice.h
> > +++ b/include/linux/netdevice.h
> > @@ -3331,7 +3331,14 @@ void netdev_run_todo(void);
> > */
> > static inline void dev_put(struct net_device *dev)
> > {
> > - this_cpu_dec(*dev->pcpu_refcnt);
> > + int __percpu *pref = READ_ONCE(dev->pcpu_refcnt);
> > +
> > + if (!pref) {
> > + pr_err("no pcpu_refcnt on dev %p(%s) state %d dismantle %d\n",
> > + dev, dev->name, dev->reg_state, dev->dismantle);
> > + BUG();
> > + }
> > + this_cpu_dec(*pref);
> > }
> >
> > /**
> >
> >
> >
>
> You want me to add this patch to what kernel version ?
> currently im after git bisect reset - so mainline stable
>
Simply us the latest net-next as mentioned in the thread title, thanks.
