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

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Date:	Sun, 15 Jul 2012 11:07:18 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Gleb Natapov <gleb@...hat.com>
CC:	David Ahern <dsahern@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: perf with precise attribute kills all KVM based VMs

On 07/12/2012 07:06 PM, Gleb Natapov wrote:
>> 
>> Note the :pH this time.
> I am not sure what perf kvm does with :pH modifier, but H modifier does
> not make sense with perf kvm and should be reported as an error by perf tool.

Maybe it should refer to the guest vs. the nested guest...

Well that's a horrible UI but we do need some way to distinguish among
the two.  Samples from the nested guest's kernel will make no sense when
looking at the guest kernel.  I guess we should default to exclude
nested guest mode.

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


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