linux-kernel - Re: [QUERY] Confusing usage of rq->nr

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Message-ID: <20140903153011.GR4783@worktop.ger.corp.intel.com>
Date:	Wed, 3 Sep 2014 17:30:11 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Cc:	Vincent Guittot <vincent.guittot@...aro.org>,
	Ingo Molnar <mingo@...nel.org>, Rik van Riel <riel@...hat.com>,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Mike Galbraith <efault@....de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	"daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Subject: Re: [QUERY] Confusing usage of rq->nr_running in load balancing

On Wed, Sep 03, 2014 at 05:51:45PM +0530, Preeti U Murthy wrote:
> Hi,
> 
> There are places in kernel/sched/fair.c in the load balancing part where
> rq->nr_running is used as against cfs_rq->nr_running. At least I could

> Did I miss something or is it true that the usage of rq->nr_running in
> the above places is incorrect?

Yeah, smells fishy. Probably hysterical accidents that haven't been
cleaned up yet. I do remember a few patches cleaning some of this up
recently. Clearly there's more to do.
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