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SubjectRe: [RFC][PATCH 4/7] sched: power: Remove power capacity hints for kworker threads
On Mon, Oct 14, 2013 at 05:13:11PM +0100, Arjan van de Ven wrote:
> On 10/14/2013 9:10 AM, Morten Rasmussen wrote:
> > On Mon, Oct 14, 2013 at 02:33:56PM +0100, 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?
> >
> > Agreed that it is not ideal. I will find a better solution for this
> > problem.
> >
>
> can you explain which architectures we're talking about that need this?
> is it only old stuff, or is there anything current ?
>

For now I need it for the cpufreq wrapper governor. I hope it can be
avoided for native power drivers, but I don't have a complete overview
of all architectures yet.



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