linux-kernel - Re: [kvm-devel] Use virtual cpu accounting if available for guest times.

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Date:	Fri, 19 Oct 2007 12:18:56 -0500
From:	Hollis Blanchard <hollisb@...ibm.com>
To:	Christian Borntraeger <borntraeger@...ibm.com>
Cc:	Avi Kivity <avi@...ranet.com>,
	kvm-devel <kvm-devel@...ts.sourceforge.net>,
	Laurent Vivier <Laurent.Vivier@...l.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [kvm-devel] Use virtual cpu accounting if available for guest
	times.

On Fri, 2007-10-19 at 11:57 -0500, Hollis Blanchard wrote:
> > @@ -669,11 +670,13 @@ __init void kvm_arch_init(void);
> > 
> >  static inline void kvm_guest_enter(void)
> >  {
> > +	account_system_vtime(current);
> >  	current->flags |= PF_VCPU;
> >  }
> > 
> >  static inline void kvm_guest_exit(void)
> >  {
> > +	account_system_vtime(current);
> >  	current->flags &= ~PF_VCPU;
> >  }
> 
> I don't understand. Should kvm_guest_exit() be calling
> account_user_vtime() (instead of account_system_vtime())?

Never mind; the tree I was looking at didn't have the
account_guest_time() stuff in account_system_time().

-- 
Hollis Blanchard
IBM Linux Technology Center

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