linux-kernel - Re: [RESEND 2][PATCH 3/4] modify account_system_time() to update guest time in cpustat and task

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Date:	Mon, 10 Sep 2007 09:13:21 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Laurent Vivier <Laurent.Vivier@...l.net>
Cc:	Ingo Molnar <mingo@...e.hu>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND 2][PATCH 3/4] modify account_system_time() to update
 guest time in cpustat and task_struct

On Mon, 10 Sep 2007 18:01:34 +0200 Laurent Vivier wrote:

> Randy Dunlap wrote:
> > On Mon, 10 Sep 2007 16:12:58 +0200 Laurent Vivier wrote:
> > 
> >> [PATCH 3/4] modify account_system_time() to add cputime to cpustat->guest if we
> >> are running a VCPU. We add this cputime to  cpustat->user instead of
> >> cpustat->system because this part of KVM code is in fact user code although it
> >> is executed in the kernel. We duplicate VCPU time between guest and user to
> >> allow an unmodified "top(1)" to display correct value. A modified "top(1)" is
> >> able to display good cpu user time and cpu guest time by subtracting cpu guest
> >> time from cpu user time. Update "gtime" in task_struct accordingly.
> >>
> >> Signed-off-by: Laurent Vivier <Laurent.Vivier@...l.net>
> > 
> > 
> > Hi,
> > Please use kernel-doc notation here:
> > (see Documentation/kernel-doc-nano-HOWTO.txt or source file examples
> > or ask)
> > 
> > easy fix:
> > 
> >  /*
> > + * Account guest cpu time to a process.
> > 
> > /**
> >  * account_guest_time - Account guest cpu time to a process.
> > 
> > + * @p: the process that the cpu time gets accounted to
> > + * @cputime: the cpu time spent in virtual machine since the last update
> > + */
> > +void account_guest_time(struct task_struct *p, cputime_t cputime)
> > +{
> 
> thank you for the comment.
> 
> But I just made a cut&past of the comment of the function above.
> 
> Should I be consistent with the doc or with the source ?

I see.  That entire file could use some kernel-doc-ization.

I suppose that lessens the need for you to make such a change.
I'll probably do it some slow night then.

Thanks,
---
~Randy
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