linux-kernel - Re: [patch 00/17] CFS Bandwidth Control v7.1

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Date:	Thu, 7 Jul 2011 12:23:44 -0400
From:	Jason Baron <jbaron@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Turner <pjt@...gle.com>, linux-kernel@...r.kernel.org,
	Bharata B Rao <bharata@...ux.vnet.ibm.com>,
	Dhaval Giani <dhaval.giani@...il.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Hu Tao <hutao@...fujitsu.com>
Subject: Re: [patch 00/17] CFS Bandwidth Control v7.1

On Thu, Jul 07, 2011 at 04:56:20PM +0200, Ingo Molnar wrote:
> * Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> 
> > On Thu, 2011-07-07 at 16:51 +0200, Ingo Molnar wrote:
> > > > Going beyond that
> > > > would be using static_branch() to track if there is any bandwidth
> > > > tracking required at all.
> > > 
> > > Could jump labels be utilized perhaps? 
> > 
> > # git grep static_branch include/linux/
> > include/linux/jump_label.h:static __always_inline bool static_branch(struct jump_label_key *key)
> 
> Right - i only read up to your first, __always_inline suggestion :)
> 
> Thanks,
> 
> 	Ingo

yes, this is the type of case jump labels is designed for. Let me know
if there are any usage questions/concerns.

thanks,

-Jason
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