Date: Fri, 29 Sep 2017 14:00:34 +0100
From: Morten Rasmussen <morten.rasmussen@arm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, tj@kernel.org,
        josef@toxicpanda.com, torvalds@linux-foundation.org,
        vincent.guittot@linaro.org, efault@gmx.de, pjt@google.com, clm@fb.com,
        dietmar.eggemann@arm.com, bsegall@google.com, yuyang.du@intel.com
Subject: Re: [PATCH -v2 03/18] sched/fair: Cure calc_cfs_shares() vs
 reweight_entity()
Message-ID: <20170929130033.GA16286@e105550-lin.cambridge.arm.com>
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On Fri, Sep 29, 2017 at 01:38:53PM +0200, Peter Zijlstra wrote:
> On Fri, Sep 29, 2017 at 10:04:34AM +0100, Morten Rasmussen wrote:
> 
> > > -	load = scale_load_down(cfs_rq->load.weight);
> > > +	load = max(scale_load_down(cfs_rq->load.weight), cfs_rq->avg.load_avg);
> > 
> > We use cfs_rq->tg_load_avg_contrib (the filtered version of
> > cfs_rq->avg.load_avg) instead of cfs_rq->avg.load_avg further down, so I
> > think we should here too for consistency.
> > 
> > +	load = max(scale_load_down(cfs_rq->load.weight),
> > +		   cfs_rq->tg_load_avg_contrib);
> > 
> 
> No; we must use tg_load_avg_contrib because that is what's inclded in
> tg_weight, but we want to add the most up-to-date value back in.

Agreed. Looking at it again it make sense.