From: Avi Kivity <avi@redhat.com>
To: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
kvm@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Fr??d??ric Weisbecker <fweisbec@gmail.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Lin Ming <ming.m.lin@intel.com>,
Sheng Yang <sheng@linux.intel.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
oerg Roedel <joro@8bytes.org>,
Jes Sorensen <Jes.Sorensen@redhat.com>,
Gleb Natapov <gleb@redhat.com>,
Zachary Amsden <zamsden@redhat.com>,
zhiteng.huang@intel.com, tim.c.chen@intel.com,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [RFC] para virt interface of perf to support kvm guest os statistics collection in guest os
Date: Thu, 10 Jun 2010 06:06:06 +0300 [thread overview]
Message-ID: <4C10569E.6020503@redhat.com> (raw)
In-Reply-To: <1276136493.2096.462.camel@ymzhang.sh.intel.com>
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.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2010-06-10 3:06 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 3:30 [RFC] para virt interface of perf to support kvm guest os statistics collection in guest os Zhang, Yanmin
2010-06-09 8:33 ` Avi Kivity
2010-06-09 9:21 ` Zhang, Yanmin
2010-06-09 9:41 ` Avi Kivity
2010-06-09 10:08 ` Peter Zijlstra
2010-06-09 10:27 ` Ingo Molnar
2010-06-09 11:12 ` Avi Kivity
2010-06-10 2:21 ` Zhang, Yanmin
2010-06-10 3:06 ` Avi Kivity [this message]
2010-06-10 5:13 ` Zhang, Yanmin
2010-06-10 9:50 ` Peter Zijlstra
2010-06-11 2:11 ` Zhang, Yanmin
2010-06-09 8:59 ` Avi Kivity
2010-06-09 9:30 ` Zhang, Yanmin
2010-06-09 9:46 ` Avi Kivity
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