RE: [PATCH 0/6] x86/cpu hotplug: Wake up offline CPU via mwait ornmi

[Peter Zijlstra]

On Tue, 2012-06-05 at 16:18 +0000, Yu, Fenghua wrote:
> Actually some Linux people are adjusting online/offline CPU's based on
> workload to save power in their business. There are some advantages
> for online/offline CPU's than idling CPU's.

Like what? Offline is nothing more than a C state on x86. 
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