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Date: Wed, 1 Jun 2005 16:59:32 -0700
To: Bill Huey <bhuey@lnxw.com>
Cc: Andrea Arcangeli <andrea@suse.de>, Esben Nielsen <simlo@phys.au.dk>,
       Thomas Gleixner <tglx@linutronix.de>,
       Karim Yaghmour <karim@opersys.com>, Ingo Molnar <mingo@elte.hu>,
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       "Paul E. McKenney" <paulmck@us.ibm.com>,
       James Bruce <bruce@andrew.cmu.edu>,
       Nick Piggin <nickpiggin@yahoo.com.au>, Andi Kleen <ak@muc.de>,
       Sven-Thorsten Dietrich <sdietrich@mvista.com>, dwalker@mvista.com,
       hch@infradead.org, akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: RT patch acceptance
Message-ID: <20050601235932.GA12613@nietzsche.lynx.com>
References: <Pine.OSF.4.05.10506012129460.1707-100000@da410.phys.au.dk> <20050601195905.GX5413@g5.random> <20050601201754.GA27795@nietzsche.lynx.com> <20050601203212.GZ5413@g5.random> <20050601204612.GA27934@nietzsche.lynx.com> <20050601210716.GB5413@g5.random> <20050601214257.GA28196@nietzsche.lynx.com> <20050601215913.GB28196@nietzsche.lynx.com> <20050601223250.GH5413@g5.random> <20050601230244.GA11262@nietzsche.lynx.com>
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From: Bill Huey (hui) <bhuey@lnxw.com>
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On Wed, Jun 01, 2005 at 04:02:44PM -0700, Bill Huey wrote:
> This is not the purpose of the patch, nor will it ever be. RT apps don't
> depend on this property as was previously mentioned in this thread.
... 
> Again, this has been covered previously by this thread. It's ultimately
> about writing RT apps that have a more sophisticated use that RTAI or
> RT Linux.

Andrea,

I mean those above comments to be hard RT.

I do mention a syscall use and expression of these RT properties, but it's
really not hard RT but something else closer to soft RT threads. I blew
it by using the wrong definition there.

They still all have to interact with each other in a temporarly protected
way so that latency is propagated through each RT domain (soft, hard, none)
in the app.

bill