On 01/20/2017 05:43 AM, Rafael J. Wysocki wrote:

The above may be problematic if the constraints change relatively
often.  It is global and it will affect all of the CPUs in the system
every time and now think about systems with hundreds of them.

Yes, the disadvantage is waking up all idle cpus when value changed. As
to the multi core concern, maybe a per cpu notifier way is better? But
that's another story of pm_qos...

So Rafael, any comments for this patch version?

Regards
Alex