linux-kernel - Re: [PATCH 1/2] sched: move scheduler sysctl bits into dedicated header file

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Date:	Thu, 31 Jan 2013 12:25:08 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Clark Williams <williams@...hat.com>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] sched: move scheduler sysctl bits into dedicated
 header file


* Clark Williams <williams@...hat.com> wrote:

> On Tue, 29 Jan 2013 15:05:43 +0900
> Namhyung Kim <namhyung@...nel.org> wrote:
> 
> > Hi Clark,
> > 
> > On Mon, 28 Jan 2013 14:31:20 -0600, Clark Williams wrote:
> > > Move all the scheduler sysctl-related bits out of include/linux/sched.h
> > > into a new file include/linux/sched_sysctl.h.
> > >
> > > Signed-off-by: Clark Williams <williams@...hat.com>
> > > ---
> > [snip]
> > > diff --git a/include/linux/sched_sysctl.h b/include/linux/sched_sysctl.h
> > > new file mode 100644
> > > index 0000000..912adab
> > > --- /dev/null
> > > +++ b/include/linux/sched_sysctl.h
> > > @@ -0,0 +1,121 @@
> > > +#ifndef _SCHED_SYSCTL_H
> > > +#define _SCHED_SYSCTL_H
> > > +
> > > +
> > > +/* provide a home for sysctl scheduler tuning knobs */
> > > +
> > > +/*
> > > + * default timeslice is 100 msecs (used only for SCHED_RR tasks).
> > > + * Timeslices get refilled after they expire.
> > > + */
> > > +#define RR_TIMESLICE		(100 * HZ / 1000)
> > 
> > It seems this line came from sched.h but I can't find that part
> > deleted.
> > 
> 
> Arggghh! I reorganized the commits and didn't remove 
> RR_TIMESLICE when I moved it. I'm surprised it compiled.
> 
> I can generate a new patchset or let Ingo just remove it from 
> sched.h.

Please generate a new patch-set.

Mind also changing the placement of the new file a bit? Could 
you create a new include/linux/sched/ directory, and put a new 
sysctl.h into it?

That way further sched.h splitups will populate 
include/linux/sched/ nicely.

Agreed?

Thanks,

	Ingo
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