linux-kernel - Re: [RFC v4 PATCH 2/7] sched: Bandwidth initialization for fair task groups

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Message-ID: <20091205130446.GB6204@in.ibm.com>
Date:	Sat, 5 Dec 2009 18:34:46 +0530
From:	Bharata B Rao <bharata@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Gautham R Shenoy <ego@...ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Herbert Poetzl <herbert@...hfloor.at>,
	Avi Kivity <avi@...hat.com>,
	Chris Friesen <cfriesen@...tel.com>,
	Paul Menage <menage@...gle.com>,
	Mike Waychison <mikew@...gle.com>
Subject: Re: [RFC v4 PATCH 2/7] sched: Bandwidth initialization for fair
	task groups

On Fri, Dec 04, 2009 at 05:09:57PM +0100, Peter Zijlstra wrote:
> On Tue, 2009-11-17 at 20:04 +0530, Bharata B Rao wrote:
> > +/*
> > + * TODO: Check if this kind of timer setup is sufficient for cfs or
> > + * should we do what rt is doing.
> > + */
> > +static void start_cfs_bandwidth(struct task_group *tg)
> 
> is there a reason not to do as rt does?

Not really, rt seems to have an elaborate mechanism to check for overruns etc.
I was in two minds if I need to have the same for cfs, may be I will follow
rt here also.

Regards,
Bharata.
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