linux-kernel - Re: [PATCH 2/4] perf: Allow guest PEBS for KVM owned counters

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Message-ID: <20140530073153.GA20167@laptop.programming.kicks-ass.net>
Date:	Fri, 30 May 2014 09:31:53 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	gleb@...nel.org, pbonzini@...hat.com, eranian@...gle.com,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 2/4] perf: Allow guest PEBS for KVM owned counters

On Thu, May 29, 2014 at 06:12:05PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> Currently perf unconditionally disables PEBS for guest.
> 
> Now that we have the infrastructure in place to handle
> it we can allow it for KVM owned guest events. For
> the perf needs to know that a event is owned by
> a guest. Add a new state bit in the perf_event for that.
> 

This doesn't make sense; why does it need to be owned?
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