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Date: Tue, 05 Jun 2012 18:09:25 +0200 From: Peter Zijlstra <peterz@...radead.org> To: "Yu, Fenghua" <fenghua.yu@...el.com> Cc: Rusty Russell <rusty@...tcorp.com.au>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>, H Peter Anvin <hpa@...or.com>, "Siddha, Suresh B" <suresh.b.siddha@...el.com>, "Luck, Tony" <tony.luck@...el.com>, "Mallick, Asit K" <asit.k.mallick@...el.com>, Arjan Dan De Ven <arjan@...ux.intel.com>, linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>, linux-pm <linux-pm@...r.kernel.org>, "Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com> Subject: RE: [PATCH 0/6] x86/cpu hotplug: Wake up offline CPU via mwait or nmi On Tue, 2012-06-05 at 16:02 +0000, Yu, Fenghua wrote: > > Users can consolidate processes on a few online CPU's and offline the > rest when workload is light. No they can't, hotplug is a root only op. > This consolidation can save more power and have better performance > than idling CPU's because hot cache in online CPU's and offline CPU's > can be allocated in same package. Yeah, or you fix the load-balancer to do this. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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