linux-kernel - Re: [patch 1/3] sched: use jump labels to reduce overhead when bandwidth control is inactive

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Message-ID: <1320744505.2244.7.camel@twins>
Date:	Tue, 08 Nov 2011 10:28:25 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Paul Turner <pjt@...gle.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 1/3] sched: use jump labels to reduce overhead when
 bandwidth control is inactive

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..
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