Re: [patch 13/19] GTOD: Mark TSC unusable for highres timers

[Ingo Molnar]

* Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:

> > Most systems don't have C3 right now. And on those that have 
> > (laptops) it tends to be not that critical because they normally 
> > don't run workload where gettimeofday() is really time critical (and 
> > nobody expects them to be particularly fast anyways)
> 
> and that got changed when the blade people decided to start using 
> laptop processors ......

and some systems disable the lapic in C2 already: BIOSs started doing 
lowlevel-C3 in their C2 functionality and lie to the OS about it.

	Ingo
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