linux-kernel - Re: [RESEND][PATCH 0/4] Virtual Machine Time Accounting

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Message-ID: <46E53D96.4050409@qumranet.com>
Date:	Mon, 10 Sep 2007 15:50:30 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Laurent Vivier <Laurent.Vivier@...l.net>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND][PATCH 0/4] Virtual Machine Time Accounting

Ingo Molnar wrote:
> * Laurent Vivier <Laurent.Vivier@...l.net> wrote:
>
>   
>> Ingo, please, could you have a look to these patches ?
>>
>> The aim of these four patches is to introduce Virtual Machine time 
>> accounting.
>>
>> [PATCH 1/4] as recent CPUs introduce a third running state, after 
>> "user" and "system", we need a new field, "guest", in cpustat to store 
>> the time used by the CPU to run virtual CPU. Modify /proc/stat to 
>> display this new field.
>>     
>
> the concept certainly looks sane to me.
>
> The heavy-handed use of #ifdefs uglifies the code to a large degree, but 
> this is not a fundamental problem: since basically all distros have KVM 
> enabled (and lguest benefits from this too), could you just make all 
> this new code unconditional?
>   

I imagine the embedded people will complain... perhaps move all the code 
to a #ifdef section above with a full implementation and a stub 
implementation.

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

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