linux-kernel - Re: perf with precise attribute kills all KVM based VMs

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Message-ID: <20120712161359.GJ7298@redhat.com>
Date:	Thu, 12 Jul 2012 19:13:59 +0300
From:	Gleb Natapov <gleb@...hat.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Avi Kivity <avi@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: perf with precise attribute kills all KVM based VMs

On Thu, Jul 12, 2012 at 07:06:35PM +0300, Gleb Natapov wrote:
> > 
> > So, is the idea of your patch to not enable the PEBS in guest mode?
> > 
> Yes, the idea of my patch is to disable PEBS and the guest entry.
> 
BTW what is you host cpu? My patch works only for those that have global
control register to disable PMU events, but that should cover most of
moder cpus.

--
			Gleb.
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