lkml.org 
[lkml]   [2013]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC][PATCH 4/7] sched: power: Remove power capacity hints for kworker threads
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)



\
 
 \ /
  Last update: 2013-10-14 17:41    [W:2.286 / U:0.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site