linux-kernel - Re: [RFC] Unify KVM kernel-space and user-space code into a single project

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Message-ID: <4BA7C4FF.3080407@codemonkey.ws>
Date:	Mon, 22 Mar 2010 14:29:03 -0500
From:	Anthony Liguori <anthony@...emonkey.ws>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Avi Kivity <avi@...hat.com>, Pekka Enberg <penberg@...helsinki.fi>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Sheng Yang <sheng@...ux.intel.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	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>, ziteng.huang@...el.com,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Fr?d?ric Weisbecker <fweisbec@...il.com>,
	Gregory Haskins <ghaskins@...ell.com>
Subject: Re: [RFC] Unify KVM kernel-space and user-space code into a single
 project

On 03/22/2010 02:22 PM, Ingo Molnar wrote:
>> Transitive had a product that was using a KVM context to run their
>> binary translator which allowed them full access to the host
>> processes virtual address space range.  In this case, there is no
>> kernel and there are no devices.
>>      
> And your point is that such vcpus should be excluded from profiling just
> because they fall outside the Qemu/libvirt umbrella?
>    

You don't instrument it the way you'd instrument an operating system so 
no, you don't want it to show up in perf kvm top.

Regards,

Anthony Liguori

> 	Ingo
>    

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