From: Ingo Molnar <mingo@elte.hu>
To: Esben Nielsen <simlo@phys.au.dk>
Cc: Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org,
Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>,
Daniel Walker <dwalker@mvista.com>,
Oleg Nesterov <oleg@tv-sign.ru>
Subject: Re: [patch] Real-Time Preemption, plist fixes
Date: Mon, 6 Jun 2005 14:08:16 +0200 [thread overview]
Message-ID: <20050606120816.GA13413@elte.hu> (raw)
In-Reply-To: <Pine.OSF.4.05.10506061050050.4252-100000@da410.phys.au.dk>
* Esben Nielsen <simlo@phys.au.dk> wrote:
> > i dont think fusyn's should be made available to non-RT tasks. If this
> > restriction is preserved then fusyn's would become O(max_nr_RT_tasks)
> > too.
>
> My pragmatic side agrees with you. My sense of beauty does not. I think
> you make 2 small hacks here:
>
> 1) Adding a limit like above smells wrong.
> 2) Making PI only apply to RT tasks isn't beautifull either.
Enabling PI for all tasks would certainly make plists the only viable
choice. To achieve that we'd have to do quite careful coding, as the
priorities of SCHED_OTHER tasks can change quite frequently, and the PI
code doesnt follow priority changes that well currently.
Ingo
next prev parent reply other threads:[~2005-06-06 12:08 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-05 0:17 patch] Real-Time Preemption, plist fixes Thomas Gleixner
2005-06-05 0:53 ` Daniel Walker
2005-06-05 2:33 ` Plist cleanup on RT Daniel Walker
2005-06-05 8:32 ` patch] Real-Time Preemption, plist fixes Thomas Gleixner
2005-06-05 10:53 ` Thomas Gleixner
2005-06-05 7:58 ` Esben Nielsen
2005-06-05 8:05 ` Thomas Gleixner
2005-06-05 8:42 ` Esben Nielsen
2005-06-05 8:53 ` Ingo Molnar
2005-06-05 9:00 ` Esben Nielsen
2005-06-05 8:18 ` Ingo Molnar
2005-06-05 8:21 ` Thomas Gleixner
2005-06-05 8:26 ` [patch] " Ingo Molnar
2005-06-05 8:53 ` Thomas Gleixner
2005-06-05 9:47 ` Ingo Molnar
2005-06-05 15:08 ` Daniel Walker
2005-06-05 8:54 ` Esben Nielsen
2005-06-05 13:49 ` Ingo Molnar
2005-06-05 14:35 ` Esben Nielsen
2005-06-06 7:32 ` Ingo Molnar
2005-06-06 8:57 ` Esben Nielsen
2005-06-06 12:08 ` Ingo Molnar [this message]
2005-06-06 15:04 ` Daniel Walker
2005-06-05 14:51 ` Daniel Walker
2005-06-05 15:17 ` Thomas Gleixner
2005-06-05 15:21 ` Daniel Walker
2005-06-05 15:02 ` Daniel Walker
2005-06-05 16:29 ` Daniel Walker
2005-06-06 7:44 ` Ingo Molnar
2005-06-06 14:49 ` Daniel Walker
-- strict thread matches above, loose matches on Subject: below --
2005-06-06 7:44 Perez-Gonzalez, Inaky
2005-06-06 7:57 ` Ingo Molnar
2005-06-06 14:56 ` Daniel Walker
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