linux-kernel - Re: [patch 06/15] sched: accumulate per-cfs_rq cpu usage and charge against bandwidth

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Message-ID: <1305646122.2466.5894.camel@twins>
Date:	Tue, 17 May 2011 17:28:42 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Paul Turner <pjt@...gle.com>
Cc:	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>,
	Ingo Molnar <mingo@...e.hu>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Nikhil Rao <ncrao@...gle.com>
Subject: Re: [patch 06/15] sched: accumulate per-cfs_rq cpu usage and
 charge against bandwidth

On Mon, 2011-05-16 at 05:59 -0700, Paul Turner wrote:
> On Mon, May 16, 2011 at 3:27 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> > On Tue, 2011-05-03 at 02:28 -0700, Paul Turner wrote:
> >> +unsigned int sysctl_sched_cfs_bandwidth_slice = 5000UL;
> >
> > What happens when the period is smaller than the slice?
> >
> 
> We'll always take at most whatever's left in this case.

Right, saw that, but it might be good to have a little comment
explaining the interaction between the slice and the period things.
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