linux-kernel - Re: [PATCH 0/6] [RFC] Proposal for optimistic suspend idea.

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Date:	Wed, 28 Sep 2011 09:51:45 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	John Stultz <john.stultz@...aro.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, arve@...roid.com,
	markgross@...gnar.org, Alan Stern <stern@...land.harvard.edu>,
	amit.kucheria@...aro.org, farrowg@...ibm.com,
	"Dmitry Fink (Palm GBU)" <Dmitry.Fink@...m.com>,
	linux-pm@...ts.linux-foundation.org, khilman@...com,
	Magnus Damm <damm@...nsource.se>, mjg@...hat.com,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 0/6] [RFC] Proposal for optimistic suspend idea.

On Tue, 2011-09-27 at 15:56 -0700, John Stultz wrote:
> Sure, and real-time tasks should coordinate with all of userland to just
> make sure no one gets in the way! And those applications should respect
> that! Why is all that *useless* code in the kernel!? :) 

In fact they should, its impossible to develop two sets of real-time
applications and shove them on the same box without co-ordination.

SCHED_FIFO is an utter trainwreck, you're talking to the guy who gave a
conference talk on why SCHED_FIFO sucks.

The only reason we have SCHED_FIFO is because of POSIX, and its one of
those things where they fucked up worse than usual (mostly because
people often don't realize how broken it is).



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