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Date: Sun, 22 May 2016 11:36:38 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
        Pavan Kondeti <pkondeti@codeaurora.org>,
        Ben Segall <bsegall@google.com>,
        Matt Fleming <matt@codeblueprint.co.uk>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Paul Turner <pjt@google.com>, Thomas Gleixner <tglx@linutronix.de>,
        byungchul.park@lge.com, Andrew Hunter <ahh@google.com>
Subject: Re: [patch] sched/fair: Move se->vruntime normalization state into
 struct sched_entity
Message-ID: <20160522093638.GL3193@twins.programming.kicks-ass.net>
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 <1463857236.10353.5.camel@gmail.com>
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On Sun, May 22, 2016 at 09:00:01AM +0200, Mike Galbraith wrote:
> On Sat, 2016-05-21 at 21:00 +0200, Mike Galbraith wrote:
> > On Sat, 2016-05-21 at 16:04 +0200, Mike Galbraith wrote:
> > 
> > > Wakees that were not migrated/normalized eat an unwanted min_vruntime,
> > > and likely take a size XXL latency hit.  Big box running master bled
> > > profusely under heavy load until I turned TTWU_QUEUE off.
> 
> May as well make it official and against master.today.  Fly or die
> little patchlet.
> 
> sched/fair: Move se->vruntime normalization state into struct sched_entity

Yeah, I used to have a patch like this; but for debugging. I don't
particularly like carrying this information other than for verification
because it means we either do too much or too little normalization.

I'll try and have a look on Monday, but I got some real-life things to
sort out first..