Re: [RFC][PATCH 4/7] sched: power: Remove power capacity hints forkworker threads

[Arjan van de Ven]

On 10/14/2013 6:33 AM, Peter Zijlstra wrote:
> On Fri, Oct 11, 2013 at 06:19:14PM +0100, Morten Rasmussen wrote:
> > Removing power hints for kworker threads enables easier use of
> > workqueues in the power driver late callback. That would otherwise
> > lead to an endless loop unless it is prevented in the power driver.
>
> There's many kworker users; some of them actually consume lots of
> cputime. Therefore how did you come to the conclusion that excepting all
> users was the better choice of a little added complexity in the one
> place where it actually matters?

.. and likely only for a very few architectures

x86, and I suspect modern ARM, can change frequency synchronously.
(using an instruction or maybe two or three for ARM)

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