linux-kernel - Re: [announce] CFS-devel, performance improvements

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Message-Id: <1189772235.21778.287.camel@twins>
Date:	Fri, 14 Sep 2007 14:17:15 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Roman Zippel <zippel@...ux-m68k.org>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Mike Galbraith <efault@....de>
Subject: Re: [announce] CFS-devel, performance improvements

On Fri, 2007-09-14 at 14:04 +0200, Roman Zippel wrote:

> AFAICT the compensation part is already done by the scaling part, without 
> the load part it largely mirrors what __update_stats_wait_end() does, i.e. 
> it gets the same time as other tasks, which have been on the rq.

All it tried to do was approximate the situation where the task never
left the rq. I'm not saying it makes sense or is the right thing to do,
just what the thought behind that particular bit was.

There is a reason it was turned off by default:

-		SCHED_FEAT_SLEEPER_AVG		*0 |



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