Re: [PATCH] x86 idle: repair large-server 50-watt idle-power regression

[H. Peter Anvin]

On 12/19/2013 09:07 AM, Ingo Molnar wrote:
> 
> Likewise, having a barrier before the MONITOR looks sensible as well. 
> Having it _after_ monitor looks weird and is probably wrong. [It might 
> have been the effects of someone seeing the spurious wakeup problems 
> with realizing the true source, or so.]
> 

Does anyone know the history of this barrier after the monitor?  I know
Len is looking for a minimal patchset that can go into -stable, and it
seems prudent to not preturb the code more than necessary, but going
forward it would be nice to know...

	-hpa


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