Re: [Xen-devel] patch "x86/cpufreq: relocate the driver register function" breaks cpu hot(un)plug

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Mon, 2015-10-12 at 07:19 -0600, Jan Beulich wrote:
> > > > On 09.10.15 at 22:00, <konrad.wilk@xxxxxxxxxx> wrote:
> > Anyhow it may be due to the fact that cpufreq_register_driver in
> > Xen is now
> > '__init' If you remove that little thing would it work?
> 
> Before adding this annotation I carefully check all callers, and both
> which I could find are themselves __init. Did I overlook any?
> 
No, I've just checked, and I also think __init is fine. And in fact, I
tried removing it, and the issue is still there.

I think the issue is the fact that we register the cpu notifier twice,
as an effect of 49388f11d512bb92706ce046643bfbb3c1d963c9, as Wei noted.

I'm just about try and confirm that...

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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