linux-kernel - Re: [RFC 0/1][PATCH] POSIX SCHED_SPORADIC implementation for tasks and groups

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Date:	Mon, 11 Aug 2008 18:49:33 +0200
From:	Dario Faggioli <raistlin@...ux.it>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Ulrich Drepper <drepper@...hat.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [RFC 0/1][PATCH] POSIX SCHED_SPORADIC implementation for tasks
	and groups

On Mon, 2008-08-11 at 18:30 +0200, Peter Zijlstra wrote:
> On Mon, 2008-08-11 at 18:23 +0200, Dario Faggioli wrote:
> > On Mon, 2008-08-11 at 16:25 +0200, Peter Zijlstra wrote:
> > > My suggestion would be to create struct sched_param2 with plenty of
> > > padding to support future expansion and add
> > > sys_sched_setscheduler2()/sys_sched_getscheduler2() to deal with this
> > > new structure.
> > And we will miss POSIX compliance. :-(
> > Anyway, I agree the ABI issue this could raise are serious enough and, I
> > repeat, I can't see any other solution too.
> 
> Well, a new version of glibc could use those to implement the posix
> interface. 
I see. Actually, you're more than right! I have not thought at it in
those terms...

> Because as I understand it, glibc can break ABI on certain
> version bumps.
Seems better to me too... I confirm I'll do the interface change as soon
as possible.

Thanks again,
Dario

-- 
<<This happens because I choose it to happen!>>
(Raistlin Majere, DragonLance Chronicles -Dragons of Spring Drawning-)
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