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Date: Thu, 10 Jun 2010 13:13:31 +0800 From: "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com> To: Avi Kivity <avi@...hat.com> Cc: LKML <linux-kernel@...r.kernel.org>, kvm@...r.kernel.org, Ingo Molnar <mingo@...e.hu>, Fr??d??ric Weisbecker <fweisbec@...il.com>, Arnaldo Carvalho de Melo <acme@...hat.com>, Cyrill Gorcunov <gorcunov@...il.com>, Lin Ming <ming.m.lin@...el.com>, Sheng Yang <sheng@...ux.intel.com>, Marcelo Tosatti <mtosatti@...hat.com>, oerg Roedel <joro@...tes.org>, Jes Sorensen <Jes.Sorensen@...hat.com>, Gleb Natapov <gleb@...hat.com>, Zachary Amsden <zamsden@...hat.com>, zhiteng.huang@...el.com, tim.c.chen@...el.com, Peter Zijlstra <a.p.zijlstra@...llo.nl> Subject: Re: [RFC] para virt interface of perf to support kvm guest os statistics collection in guest os On Thu, 2010-06-10 at 06:06 +0300, Avi Kivity wrote: > On 06/10/2010 05:21 AM, Zhang, Yanmin wrote: > > > >> I see. So put it in a union. Or perhaps not even in a union - what if > >> a kvm guest is also acting as a kvm host? > >> > > My patch has consideration on it. I compiled kernel with host and guest support > > at the same time. The accessing to perf_event->shadow is really under specific > > scenarios, or they are just in specific functions. These functions are called > > just bu host kernel , or just by guest kernel. > > > > But a kernel can be both guest and host at the same time. Currently > this only works on AMD, but there was some work to bring it to Intel as > well. Oh, this is a fancy VT feature. My patch doesn't support this mode. -- 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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