linux-kernel - Re: [PATCH 6/6] sched: disabled rt-bandwidth by default

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Message-ID: <20080828215321.7a1fabd5@lxorguk.ukuu.org.uk>
Date:	Thu, 28 Aug 2008 21:53:21 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Mark Hounschell <markh@...pro.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	Stefani Seibold <stefani@...bold.net>,
	Dario Faggioli <raistlin@...ux.it>,
	Max Krasnyansky <maxk@...lcomm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 6/6] sched: disabled rt-bandwidth by default

> And I'm not really interested. Quite frankly, I suspect the "we want to 
> run something like pulseaudio with RT priorities" camp is the more common 
> one, and in that context I understand limiting SCHED_FIFO sounds perfectly 
> understandable.

Is there actually a reason we can't have two forms of SCHED_FIFO. For
hard RT the existing behaviour is a lot more useful and it is hard to see
how you'd emulate it.

> quite frankly, most programmers aren't "supposedly bad". And if you think 
> that the hard-RT "real man" programmers aren't bad, I really have nothing 
> to say.

"real man" programmers stare at the code in Zen contemplation and debug
by powercycling - thats one thing even hard RT processes can't beat.

Alan
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