linux-kernel - Re: [BUG] How to get real-time priority using idle priority

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Message-ID: <20090112131406.GB670@elte.hu>
Date:	Mon, 12 Jan 2009 14:14:06 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Mike Galbraith <efault@....de>
Cc:	Brian Rogers <brian@...w.org>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [BUG] How to get real-time priority using idle priority


* Mike Galbraith <efault@....de> wrote:

> > I haven't been able to reproduce complete hangs, but with your proggy 
> > adapted to my quad, _and_ the addition of a SCHED_NORMAL hog, I can 
> > reproduce some very bad interactivity, including massive character 
> > repeats while attempting to type, and general "lurchiness" (_bad_ 
> > wakeup latency).  I'll poke it with a sharp stick or two.
> 
> Would you mind trying the below?

i've applied your fix to tip/sched/urgent and merged it into tip/master.

Brian, you might want to test tip/master, as per:

 http://people.redhat.com/mingo/tip.git/README

which now has this fix included. Can you make it break?

	Ingo
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