linux-kernel - Re: [PATCH 3/3] KVM: perf: kvm events analysis tool

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Date:	Mon, 13 Feb 2012 08:52:54 -0700
From:	David Ahern <dsahern@...il.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
CC:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH 3/3] KVM: perf: kvm events analysis tool



On 02/13/2012 03:06 AM, Xiao Guangrong wrote:
> On 02/13/2012 01:32 PM, David Ahern wrote:
> 
>> [sorry for the top post - you would think Android would have a better mail client]
>>
>> If the first patch is needed then kvm-events will not work with older, unpatched kernels. That's a big limitation from a perf perpective.
>>
> 
> 
> The first patch is only needed for code compilation, after kvm-events is
> compiled, you can analyse any kernels. :)

understood.

Now that I recall perf's way of handling out of tree builds, a couple of
comments:

1. you need to add the following to tools/perf/MANIFEST
arch/x86/include/asm/svm.h
arch/x86/include/asm/vmx.h
arch/x86/include/asm/kvm_host.h

2.scripts/checkpatch.pl is an unhappy camper.

I'll take a look at the code and try out the command when I get some time.

David
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