linux-kernel - Re: Use virtual cpu accounting if available for guest times.

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Message-ID: <47175495.6060706@qumranet.com>
Date:	Thu, 18 Oct 2007 14:41:57 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	Christian Borntraeger <borntraeger@...ibm.com>
CC:	Laurent Vivier <Laurent.Vivier@...l.net>,
	linux-kernel@...r.kernel.org,
	kvm-devel <kvm-devel@...ts.sourceforge.net>
Subject: Re: Use virtual cpu accounting if available for guest times.

Christian Borntraeger wrote:
> ppc and s390 offer the possibility to track process times precisely
> by looking at cpu timer on every context switch, irq, softirq etc.
> We can use that infrastructure as well for guest time accounting.
> We need to account the used time before we change the state. 
> This patch adds a call to account_system_vtime to kvm_guest_enter
> and kvm_guest exit. If CONFIG_VIRT_CPU_ACCOUNTING is not set,
> account_system_vtime is defined in hardirq.h as an empty function,
> which means this patch does not change the behaviour on other
> platforms.
>
> I compile tested this patch on x86 and function tested the patch on
> s390.
>
> Avi, please apply.
>
>   

Done.  Thanks!

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

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