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Subject: Re: [patch 1/3] sched: use jump labels to reduce overhead when
 bandwidth control is inactive
From: Peter Zijlstra <peterz@infradead.org>
To: Paul Turner <pjt@google.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>
Date: Tue, 08 Nov 2011 10:28:25 +0100
References: <20111108042632.977080206@google.com>
	 <20111108042736.560831357@google.com>
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On Tue, 2011-11-08 at 10:26 +0100, Peter Zijlstra wrote:
> On Mon, 2011-11-07 at 20:26 -0800, Paul Turner wrote:
> > +static void account_cfs_bandwidth_used(int enabled, int was_enabled)
> > +{
> > +       /* only need to count groups transitioning between enabled/!enabled */
> > +       if (enabled && !was_enabled)
> > +               jump_label_inc(&__cfs_bandwidth_used);
> > +       else if (!enabled && was_enabled)
> > +               jump_label_dec(&__cfs_bandwidth_used);
> > +} 
> 
> Can't you use jump_label_enabled(&__cfs_bandwidth_used) to was_enabled ?

n/m I'm not awake yet..