Re: [BUG] While changing the cpufreq governor, kernel hits a bugin workqueue.c

[Nageswara R Sastry]

Hi Johannes,
> > > =======================================================
> > > [ INFO: possible circular locking dependency detected ]
> > > 2.6.25.7.cpufreq_patch #2
> > > -------------------------------------------------------
[...]
> > Okay, the problem is in cpufreq_conservative.c.  We
> > cancel_delayed_work_sync() while holding the mutex, but the work itself
> > tries to grab it and there it deadlocks; lockdep caught that right.
> >
> > The hunk for _ondemand is correct, but the one for _conservative is
> > obviously wrong, sorry :/
> >
> > I will whip something up and get back to you.  Thanks a lot for
> > testing!
>
> Could you try the attached patch instead of the one above?
>
> Dave, I dropped the mutex-grabbing from the conservative worker function
> as well as I don't see a reason for it, please correct me if I'm wrong.
>
> 	Hannes

The script is running now for more than 6 hours successfully, I will 
continue this and let you know if there are any failures.

* I am seeing the circular locking dependency with the above patch too.

Thanks!!
Regards
R.Nageswara Sastry
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