Messages in this thread | | | Date | Mon, 14 Oct 2013 08:14:25 -0700 | From | Arjan van de Ven <> | Subject | Re: [RFC][PATCH 4/7] sched: power: Remove power capacity hints for kworker threads |
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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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