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

From:  Linus Torvalds <torvalds-AT-linux-foundation.org>
To:  Mark Hounschell <markh-AT-compro.net>
Subject:  Re: [PATCH 6/6] sched: disabled rt-bandwidth by default
Date:  Thu, 28 Aug 2008 11:42:01 -0700 (PDT)
Message-ID:  <alpine.LFD.1.10.0808281138060.3300@nehalem.linux-foundation.org>
Cc:  Steven Rostedt <rostedt-AT-goodmis.org>, Nick Piggin <nickpiggin-AT-yahoo.com.au>, Ingo Molnar <mingo-AT-elte.hu>, Peter Zijlstra <a.p.zijlstra-AT-chello.nl>, LKML <linux-kernel-AT-vger.kernel.org>, Stefani Seibold <stefani-AT-seibold.net>, Dario Faggioli <raistlin-AT-linux.it>, Max Krasnyansky <maxk-AT-qualcomm.com>, Thomas Gleixner <tglx-AT-linutronix.de>, Andrew Morton <akpm-AT-linux-foundation.org>
Archive-link:  Article, Thread



On Thu, 28 Aug 2008, Mark Hounschell wrote:
> 
> More and more are wanting and now finding the Linux kernel to be more
> RT capable. I seem to remember way back you saying it was one thing you didn't
> really care much about one way or the other. Thats OK. But, you _are_ the man.

The thing is, the reason I dislike RT is that so many people have so 
different understanding of what RT means.

Quite frankly, I think that the people who are complaining (like you) 
think that RT means "hard realtime". You think about literally specialized 
devices.

A lot of _other_ people think that RT means "good audio latency", where it 
really is a lot softer. 

And neither camp seems to ever admit that they are just a small camp, and 
that the other camp exists or is even valid.

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.

As to your

> "just to protect a few _supposedly_ bad programmers???"

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.

		Linus



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