netdev - Re: panic 2.6.27-rc3-git2, qdisc_dequeue

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Date:	Sun, 17 Aug 2008 12:35:46 +0300
From:	Denys Fedoryshchenko <denys@...p.net.lb>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: panic 2.6.27-rc3-git2, qdisc_dequeue_head

I have applied now 
01-fix-pkt_sched: Fix unloc~ in tc_ctl_tfilter()
02-lockdep.patch (it is adding in sch_api.c lockdep_set_class)
"take 3" patch
and latest patch you sent

Is it correct?

On Sunday 17 August 2008, Jarek Poplawski wrote:
> On Sun, Aug 17, 2008 at 12:02:13PM +0300, Denys Fedoryshchenko wrote:
> > Is it was a fix? Because for now it is running fine from night (but i
> > have enabled some minor debug options in kernel). No crash or warning
> > yet.
> >
> > I disable now debug as it was before and testing more.
>
> Only the patch named "take #3" is debugging only, and the latter 2
> patches were intended to fix things. As a matter of fact the first
> fixing patch should be needed as well, so if it's possible try to add
> it again without reverting anything. It can show some minor offset
> while applying now. I resend it below for any case.
>
> Thanks,
> Jarek P.
>
> ---
>
>  include/net/sch_generic.h |    5 +++++
>  net/sched/sch_api.c       |    2 +-
>  2 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
> index a7abfda..4f28fa7 100644
> --- a/include/net/sch_generic.h
> +++ b/include/net/sch_generic.h
> @@ -193,6 +193,11 @@ static inline struct Qdisc *qdisc_root(struct Qdisc
> *qdisc) return qdisc->dev_queue->qdisc;
>  }
>
> +static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *qdisc)
> +{
> +	return qdisc->dev_queue->qdisc_sleeping;
> +}
> +
>  /* The qdisc root lock is a mechanism by which to top level
>   * of a qdisc tree can be locked from any qdisc node in the
>   * forest.  This allows changing the configuration of some
> diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
> index c25465e..5c7ae56 100644
> --- a/net/sched/sch_api.c
> +++ b/net/sched/sch_api.c
> @@ -435,7 +435,7 @@ void qdisc_watchdog_init(struct qdisc_watchdog *wd,
> struct Qdisc *qdisc) {
>  	hrtimer_init(&wd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
>  	wd->timer.function = qdisc_watchdog;
> -	wd->qdisc = qdisc;
> +	wd->qdisc = qdisc_root_sleeping(qdisc);
>  }
>  EXPORT_SYMBOL(qdisc_watchdog_init);


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