Re: [PATCH]sched: stop hrtick timer if running task is switchingfrom fair scheduling class to another

[Peter Zijlstra]

On Mon, 2011-12-26 at 16:42 +0100, Oleg Nesterov wrote:
> 
> Peter, Ingo, does this code really work? SCHED_FEAT(HRTICK) == 0
> by default, and afaics you can't change it without CONFIG_SCHED_DEBUG.
> 
> 

No its broken. Maybe I should've removed it, but I've always been
meaning to fix it since SCHED_DEADLINE actually needs it, but alas.
-ENOTIME and no urgency need have conspired against it.
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