linux-kernel - Re: [patchlet] sched: fix rt throttle runtime borrowing

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Message-ID: <AANLkTinPuCg-fGBtOgYSwVf1_67dr9uzw7a-8TfxLUuW@mail.gmail.com>
Date:	Tue, 8 Mar 2011 16:19:29 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	Mike Galbraith <efault@....de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [patchlet] sched: fix rt throttle runtime borrowing

On Mon, Mar 7, 2011 at 5:33 PM, Mike Galbraith <efault@....de> wrote:
> Well, it does prevent complete death, but you have to be pretty darn
> attentive to notice that the patient is still technically alive ;-)
>
> As such, turning borrowing off by default, and making borrowing up to
> within a micron of 100% CPU an opt-in feature likely makes more sense.

Another idea comes into my head is: disable runtime borrowing for
root_task_group forever by default, but keep current behavior
for the sub-groups :)

Thanks,
Yong


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