linux-kernel - Re: [RFC] [PATCH] Pre-emption control for userspace

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Message-ID: <53175F07.3050209@oracle.com>
Date:	Wed, 05 Mar 2014 10:29:43 -0700
From:	Khalid Aziz <khalid.aziz@...cle.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Andi Kleen <andi@...stfloor.org>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	akpm@...ux-foundation.org, viro@...iv.linux.org.uk,
	oleg@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [RFC] [PATCH] Pre-emption control for userspace

On 03/05/2014 04:10 AM, Peter Zijlstra wrote:
> On Tue, Mar 04, 2014 at 04:51:15PM -0800, Andi Kleen wrote:
>> Anything else?
>
> Proxy execution; its a form of PI that works for arbitrary scheduling
> policies (thus also very much including fair).
>
> With that what you effectively end up with is the lock holder running
> 'boosted' by the runtime of its blocked chain until the entire chain
> runs out of time, at which point preemption doesn't matter anyhow.
>

I assume you are referring to 
http://users.soe.ucsc.edu/~jayhawk/watkins-rtlws09.pdf and/or 
http://www.osadl.org/fileadmin/dam/presentations/RTLWS11/peterz-edf-why-not.pdf 
? I will read through these and see if this can solve the problem.

--
Khalid
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