From: Mike Galbraith <efault@gmx.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Mark Hounschell <markh@compro.net>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
LKML <linux-kernel@vger.kernel.org>,
Stefani Seibold <stefani@seibold.net>,
Dario Faggioli <raistlin@linux.it>,
Max Krasnyansky <maxk@qualcomm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 6/6] sched: disabled rt-bandwidth by default
Date: Fri, 29 Aug 2008 09:56:47 +0200 [thread overview]
Message-ID: <1219996607.5079.142.camel@marge.simson.net> (raw)
In-Reply-To: <alpine.DEB.1.10.0808281448170.18124@gandalf.stny.rr.com>
On Thu, 2008-08-28 at 14:53 -0400, Steven Rostedt wrote:
> On Thu, 28 Aug 2008, Linus Torvalds wrote:
> >
> > 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.
>
> The fact that it actually limits a SCHED_FIFO task group, over a single
> task thread does bother me a little.
It bothers me some too. You have to patch/re-compile the kernel if you
need to turn it off and don't have SCHED_DEBUG enabled (not free).
I tripped over this recently while regression testing. I didn't expect
a gaggle of SCHED_RR tasks to be throttled on an otherwise idle box.
Hitting that perturbed test results in an unexpected manner, and sent me
off on a tangent.
-Mike
next prev parent reply other threads:[~2008-08-29 7:57 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-19 10:33 [PATCH 0/6] sched: rt-bandwidth fixes Peter Zijlstra
2008-08-19 10:33 ` [PATCH 1/6] sched: rt-bandwidth for user grouping interface Peter Zijlstra
2008-08-19 10:33 ` [PATCH 2/6] sched: rt-bandwidth accounting fix Peter Zijlstra
2008-08-19 18:33 ` Max Krasnyansky
2008-08-19 18:38 ` Peter Zijlstra
2008-08-19 10:33 ` [PATCH 3/6] sched: rt-bandwidth group disable fixes Peter Zijlstra
2008-08-19 10:33 ` [PATCH 4/6] sched: extract walk_tg_tree() Peter Zijlstra
2008-08-19 10:33 ` [PATCH 5/6] sched: rt-bandwidth fixes Peter Zijlstra
2008-08-19 10:33 ` [PATCH 6/6] sched: disabled rt-bandwidth by default Peter Zijlstra
2008-08-19 11:05 ` Ingo Molnar
2008-08-19 11:11 ` Ingo Molnar
2008-08-19 11:42 ` [PATCH] sched: extract walk_tg_tree(), fix Ingo Molnar
2008-08-19 11:17 ` [PATCH 6/6] sched: disabled rt-bandwidth by default Nick Piggin
2008-08-19 12:59 ` Ingo Molnar
2008-08-19 18:15 ` Max Krasnyansky
2008-08-20 11:56 ` Nick Piggin
2008-08-26 9:00 ` Nick Piggin
2008-08-26 9:30 ` Ingo Molnar
2008-08-26 9:44 ` Nick Piggin
2008-08-26 10:29 ` Ingo Molnar
2008-08-26 11:03 ` Nick Piggin
2008-08-26 9:54 ` Nick Piggin
2008-08-26 11:09 ` Thomas Gleixner
2008-08-26 11:27 ` Nick Piggin
2008-08-26 12:50 ` Theodore Tso
2008-08-26 13:31 ` Stefani Seibold
2008-08-26 17:55 ` Theodore Tso
2008-08-26 21:37 ` Thomas Gleixner
2008-08-26 22:49 ` Andi Kleen
2008-08-27 10:08 ` Nick Piggin
2008-08-28 10:54 ` Ingo Molnar
2008-08-28 11:09 ` Andi Kleen
2008-08-28 11:19 ` Peter Zijlstra
2008-08-28 11:28 ` Ingo Molnar
2008-08-28 11:50 ` Andi Kleen
2008-08-28 12:00 ` Peter Zijlstra
2008-08-28 12:14 ` Andi Kleen
2008-08-28 12:18 ` Nick Piggin
2008-08-28 16:19 ` Max Krasnyansky
2008-08-28 16:25 ` Ingo Molnar
2008-08-28 16:33 ` Andi Kleen
2008-08-28 12:03 ` Nick Piggin
2008-08-28 13:07 ` Ingo Molnar
2008-08-28 13:45 ` Nick Piggin
2008-08-28 12:29 ` Nick Piggin
2008-08-27 10:04 ` Nick Piggin
2008-08-26 13:47 ` Mark Hounschell
2008-08-26 23:00 ` Steven Rostedt
2008-08-27 18:55 ` Chris Friesen
2008-08-28 14:15 ` Steven Rostedt
2008-08-28 14:30 ` Ingo Molnar
2008-08-28 14:36 ` Nick Piggin
2008-08-28 15:12 ` Steven Rostedt
2008-08-28 15:34 ` Nick Piggin
2008-08-28 15:50 ` Steven Rostedt
2008-08-28 17:26 ` Linus Torvalds
2008-08-28 18:04 ` Steven Rostedt
2008-08-28 18:10 ` Darren Hart
2008-08-28 18:16 ` Mark Hounschell
2008-08-28 18:42 ` Linus Torvalds
2008-08-28 18:53 ` Steven Rostedt
2008-08-29 7:56 ` Mike Galbraith [this message]
2008-08-29 8:06 ` Peter Zijlstra
2008-08-29 8:47 ` Mike Galbraith
2008-08-28 19:39 ` Stefani Seibold
2008-08-28 20:53 ` Alan Cox
2008-08-30 6:33 ` Nick Piggin
2008-08-28 16:33 ` Max Krasnyansky
2008-08-28 17:22 ` John Kacur
2008-08-28 16:05 ` Peter Zijlstra
2008-08-28 16:15 ` Steven Rostedt
2008-08-28 16:29 ` Peter Zijlstra
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