linux-kernel - Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

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Date:	Fri, 13 Apr 2007 14:21:10 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Bill Huey <billh@...ppy.monkey.org>, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

On Fri, Apr 13, 2007 at 10:55:45PM +0200, Ingo Molnar wrote:
> Yeah. Note that there are some subtle but crutial differences between 
> PlugSched (which Con used, and which i opposed in the past) and this 
> approach.
> PlugSched cuts the interfaces at a high level in a monolithic way and 
> introduces kernel/scheduler.c that uses one pluggable scheduler 
> (represented via the 'scheduler' global template) at a time.

What I originally did did so for a good reason, which was that it was
intended to support far more radical reorganizations, for instance,
things that changed the per-cpu runqueue affairs for gang scheduling.
I wrote a top-level driver that did support scheduling classes in a
similar fashion, though it didn't survive others maintaining the patches.


-- wli
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