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Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-6
From: Lee Revell <rlrevell@joe-job.com>
To: "K.R. Foley" <kr@cybsft.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org,
       Rui Nuno Capela <rncbc@rncbc.org>, Mark_H_Johnson@Raytheon.com,
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Date: Wed, 08 Dec 2004 11:58:16 -0500
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On Wed, 2004-12-08 at 10:52 -0600, K.R. Foley wrote:
> Lee Revell wrote:
> > On Wed, 2004-12-08 at 10:07 -0600, K.R. Foley wrote:
> > 
> >>I am still confused about one thing, unrelated to this. If RT tasks 
> >>never expire and thus are never moved to the expired array??? Does that 
> >>imply that we never switch the active and expired arrays? If so how do 
> >>tasks that do expire get moved back into the active array?
> > 
> > 
> > I think that RT tasks use a completely different scheduling mechanism
> > that bypasses the active/expired array.
> > 
> > Lee
> > 
> > 
> Please don't misunderstand. I am not arguing with you because obviously 
> I am not really intimate with this code, but if the above statement is 
> true then I am even more confused than I thought. I don't see any such 
> distinctions in the scheduler code. In fact it looks to me like the 
> whole scheduler is built on the premise of allowing RT tasks to be just 
> like other tasks with a few exceptions, one of which is that RT tasks 
> never hit the expired task array.

No, you are probably right, I am the one who is confused.

Lee