linux-kernel - Re: [RFC PATCH 2/2] Add per-cgroup CPU controller statistics

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Message-ID: <20090225114143.GE4008@in.ibm.com>
Date:	Wed, 25 Feb 2009 17:11:43 +0530
From:	Bharata B Rao <bharata@...ux.vnet.ibm.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, Balaji Rao <balajirrao@...il.com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Paul Menage <menage@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [RFC PATCH 2/2] Add per-cgroup CPU controller statistics

On Wed, Feb 25, 2009 at 12:24:58PM +0100, Peter Zijlstra wrote:
> On Wed, 2009-02-25 at 16:50 +0530, Bharata B Rao wrote:
> > On Wed, Feb 25, 2009 at 12:04:10PM +0100, Peter Zijlstra wrote:
> > > On Wed, 2009-02-25 at 16:29 +0530, Bharata B Rao wrote:
> > > >  
> > > > +#ifdef CONFIG_CGROUP_SCHED
> > > > +static void account_task_group_time(struct task_struct *p,
> > > > +			enum cpu_cgroup_stat_index idx, int val)
> > > > +{
> > > > +	struct task_group *tg = task_group(p);
> > > > +
> > > > +	if (likely(tg->stat))
> > > > +		percpu_counter_add(&tg->stat->cpustat[idx], val);
> > > > +}
> > > > +#else
> > > > +#define account_task_group_time(x, y, z)	{ 0; }
> > > 
> > > inline please, so we get argument validation.
> > 
> > Actually wanted to inline, but one of the arguments (cpu_cgroup_stat_index)
> > is defined only CONFIG_CGROUP_SCHED. Hence didn't want argument
> > validation here.
> 
> Just pull the enum outside of the ifdef?

Ok will do it in the next iteration if that's acceptable and argument
validation is important.

Regards,
Bharata.
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