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Date:	Thu, 17 Jul 2014 11:05:14 +0530
From:	Viresh Kumar <>
To:	Saravana Kannan <>
Cc:	"Srivatsa S. Bhat" <>,
	"Rafael J . Wysocki" <>,
	Todd Poynor <>,
	"" <>,
	Linux Kernel Mailing List <>,
	"" <>,
	Stephen Boyd <>
Subject: Re: [PATCH v3 1/2] cpufreq: Don't destroy/realloc policy/sysfs on hotplug/suspend

On 17 July 2014 01:26, Saravana Kannan <> wrote:
> On 07/16/2014 04:16 AM, Srivatsa S. Bhat wrote:

>> That is, we wanted
>> to do the kobject cleanup after releasing the hotplug lock, and POST_DEAD
>> stage was well-suited for that.

I think, this has changed in Saravana's patch, we do it in the PREPARE stage

>> Commit 1aee40ac9c8 (cpufreq: Invoke __cpufreq_remove_dev_finish() after
>> releasing cpu_hotplug.lock) explains this in detail. Saravana, please take
>> a
>> look at that reasoning and ensure that your patch doesn't re-introduce
>> those
>> deadlock possibilities!
> But all of that was needed _because_ we were creating and destroying
> policies and kobjs all the time. We don't do that anymore. So, I don't think
> any of that applies. We only destroy when the cpufreq driver is
> unregistered. That's kinda of the point of this patchset.
> Thoughts?

See above.
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