[PATCH v3 1/2] cpufreq: Don't destroy/realloc policy/sysfs on hotplug/suspend
viresh.kumar at linaro.org
Wed Jul 16 22:35:14 PDT 2014
On 17 July 2014 01:26, Saravana Kannan <skannan at codeaurora.org> 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
>> look at that reasoning and ensure that your patch doesn't re-introduce
>> 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.
More information about the linux-arm-kernel