On Thu, 22 Sep 2016, Tim Chen wrote:
> On Wed, 2016-09-21 at 22:30 +0200, Rafael J. Wysocki wrote:
> > My current understanding is that we need to rebuild sched domains
> > after setting the priorities, 
> 
> No, that's not true.  We need to rebuild the sched domains only
> when the sched domain flags are changed, not when we are changing
> the priorities.  Only the sched domain flag is a property of
> the sched domain. CPU priority values are not part of sched domain.
> 
> Morten had similar question about whether we need to rebuild sched domain
> when we change cpu priorities when we first post the patches. 
> Peter has explained that it wasn't necessary.
> http://lkml.iu.edu/hypermail/linux/kernel/1608.3/01753.html

And why is there no explanation in form of a comment in the code?

Thanks,

        tglx

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