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

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Date:	Mon, 09 Jul 2012 17:51:29 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	David Ahern <dsahern@...il.com>, Gleb Natapov <gleb@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: perf with precise attribute kills all KVM based VMs

On 07/09/2012 05:49 PM, Peter Zijlstra wrote:
> On Mon, 2012-07-09 at 08:47 -0600, David Ahern wrote:
>> 
>> I found this testing changes to perf-kvm, but found the problem extends 
>> to just perf-record. With perf-record exclude_guest defaults to 1. See 
>> tools/perf/util/util.c, event_attr_init(). 
> 
> You lost me there.. so perf-record defaults to exclude_guest=1 (which
> would make the proposed patch I just send actually possible), but its
> still going *bang* ?

It's possible that the DS writes overshoot the MSR... or that there's a
bug somewhere.


-- 
error compiling committee.c: too many arguments to function


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