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SubjectRe: [BUG] 2.6.29.1 debugobjects warning
On Fri, 24 Apr 2009, Ingo Molnar wrote:
>
> * Andrew Morton <akpm@linux-foundation.org> wrote:
>
> > On Thu, 23 Apr 2009 10:00:02 -0400
> > Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:
> >
> > > ODEBUG: init active object type: timer_list
>
> > It seems to be complaining that cpufreq_governor_dbs() is running
> > init_timer() against a timer which has already been initialised
> > once.
>
> Not just already initialized - but also active. There's these states
> for an object:
>
> ODEBUG_STATE_NONE,
> ODEBUG_STATE_INIT,
> ODEBUG_STATE_INACTIVE,
> ODEBUG_STATE_ACTIVE,
> ODEBUG_STATE_DESTROYED,
>
> So the 'init active object type' warning above suggests that an
> init_timer() has been done on an already running timer. If true then
> that is a bad bug - can corrupt timer state, etc.
>
> Thomas, do you agree?

Yes, that kind of bug makes the timer wheel explode later on due to
list corruption.

Thanks,

tglx



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