linux-kernel - Re: [Fwd: Re: RFC for a new Scheduling policy/class in the Linux-kernel]

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Message-ID: <alpine.LRH.2.00.0907161513050.3814@anderson.cs.unc.edu>
Date:	Thu, 16 Jul 2009 15:18:26 -0400 (EDT)
From:	"James H. Anderson" <anderson@...unc.edu>
To:	Raj Rajkumar <raj@....cmu.edu>
cc:	Ted Baker <baker@...fsu.edu>, Noah Watkins <jayhawk@....ucsc.edu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Raistlin <raistlin@...ux.it>,
	Douglas Niehaus <niehaus@...c.ku.edu>,
	Henrik Austad <henrik@...tad.us>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Bill Huey <billh@...ppy.monkey.org>,
	"Linux RT <linux-rt-users@...r.kernel.org> Fabio Checconi" 
	<fabio@...dalf.sssup.it>, Thomas Gleixner <tglx@...utronix.de>,
	Dhaval Giani <dhaval.giani@...il.com>,
	Tommaso Cucinotta <cucinotta@...up.it>,
	Giuseppe Lipari <lipari@...is.sssup.it>,
	Bjoern Brandenburg <bbb@...unc.edu>
Subject: Re: [Fwd: Re: RFC for a new Scheduling policy/class in the
 Linux-kernel]


Hi Raj,

On Thu, 16 Jul 2009, Raj Rajkumar wrote:

> non-preemptive critical section.    In addition, we could allow mutexes 
> to either pick basic priority inheritance (desirable for local mutexes?) 
> or the priority ceiling version (desirable for global mutexes shared 
> across processors/cores).

This discussion when I entered it was about using global scheduling
in Linux (not partitioning), so that's what I thought the focus of the
discussion was.  What's the definition of a local mutex in that case?
And how do you use ceilings under global scheduling?

Thanks.

-Jim
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