14 Oct
2013
14 Oct
'13
3:14 p.m.
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)