[Bug 77201] CPU online hangs, works when powernow-k8 is UN-loaded

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https://bugzilla.kernel.org/show_bug.cgi?id=77201

--- Comment #53 from Viresh Kumar <viresh.kumar@linaro.org> ---
(In reply to Srivatsa S. Bhat from comment #48)
> Meanwhile, can the bug reporter please test these commits that I mentioned
> earlier? (6f1e4efd882 is my first suspect commit after 3.13.8)
> 
> 6f1e4efd882 (cpufreq: Fix timer/workqueue corruption by protecting reading
> governor_enabled)

It was already reverted in my branch

> 1c0ca90207 (cpufreq: don't call cpufreq_update_policy() on CPU addition)

Went in 3.15

> 4e97b631f24 (cpufreq: Initialize governor for a new policy under
> policy->rwsem)

Also reverted in my branch

> I know that the issue might not be in cpufreq (especially after your test
> results from Viresh's branch). But I still I have some tiny hope that we
> might have missed something in cpufreq... Besides, bisecting within the
> cpufreq commits is a lot faster than bisecting everything between 3.13.8 and
> 3.14, in case the bug is really in cpufreq.
> 
> By the way, testing the above commits means that you need to test 1 commit
> before the commits mentioned above and see if it works, and then go to the
> mentioned commit and see if it fails.

Actually I couldn't understand how this may help? Sorry for missing what you
had in mind :(

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