Re: 50 Watt idle power regression bisected to Linux-3.10

[Borislav Petkov]

On Wed, Dec 11, 2013 at 03:08:35PM -0800, H. Peter Anvin wrote:
> So I would like to propose that we switch to using a percpu variable
> which is a single cache line of nothing at all. It would only ever
> be touched by MONITOR and for explicit wakeup. Hopefully that will
> resolve this problem without the need for the CLFLUSH.

Yep, makes a lot of sense to me to have an exclusive (overloaded meaning
here :-)) cacheline only for that. And, if it works, we'll save us the
penalty from the CLFLUSH too, cool.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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