linux-kernel - Re: [RFC] sched: nohz_idle

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Message-ID: <1347525949.15764.109.camel@twins>
Date:	Thu, 13 Sep 2012 10:45:49 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vincent Guittot <vincent.guittot@...aro.org>
Cc:	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org,
	linaro-dev@...ts.linaro.org, mingo@...hat.com,
	Venkatesh Pallipadi <venki@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [RFC] sched: nohz_idle_balance

On Thu, 2012-09-13 at 10:37 +0200, Vincent Guittot wrote:
> > I think you need to present numbers showing benefit.  Crawling all over
> > a mostly idle (4096p?) box is decidedly bad thing to do. 

Yeah, but we're already doing that anyway.. we know nohz idle balance
doesn't scale. Venki and Suresh were working on that, but with Venki
switching jobs this work got dropped.

I did talk to Suresh about it a week or so ago.. I think he was going to
look at it again.
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