linux-kernel - Re: [PATCH 5/5] sched, autogroup: runtime enable/disable tuning fix

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Message-ID: <20110220141003.GA6006@zhy>
Date:	Sun, 20 Feb 2011 22:10:04 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	Mike Galbraith <efault@....de>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 5/5] sched, autogroup: runtime enable/disable tuning fix

On Sun, Feb 20, 2011 at 02:09:39PM +0100, Mike Galbraith wrote:
> On Sun, 2011-02-20 at 15:08 +0800, Yong Zhang wrote:
> > Now enable/disable autogroup at runtime is just a flag,
> > it doesn't take effect on current process of the system.
> 
> Yup, they only move upon migration, which can take up to forever.

Yeah. so on UP, the user can have autogroup forever or not, and
sched_autogroup_enable is a nop.

> Linus
> didn't like the idea of an active on/off switch, so it got whacked.

Seems I missed that very thread.


Apart from runtime enable/disable issue, I think patch1~3 could
still be applied beause they really fix some problem or bring
some improvement.

Thanks,
Yong
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