linux-kernel - Re: [patch 07/16] sched: expire invalid runtime

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Message-ID: <1308757658.1022.50.camel@twins>
Date:	Wed, 22 Jun 2011 17:47:38 +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>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Ingo Molnar <mingo@...e.hu>, Pavel Emelyanov <xemul@...nvz.org>
Subject: Re: [patch 07/16] sched: expire invalid runtime

On Tue, 2011-06-21 at 00:16 -0700, Paul Turner wrote:

> +	now = sched_clock_cpu(smp_processor_id());
> +	cfs_b->runtime_expires = now + ktime_to_ns(cfs_b->period);

> +	if ((s64)(rq->clock - cfs_rq->runtime_expires) < 0)

Is there a good reason to mix these two (related) time sources?
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