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

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Message-ID: <Pine.LNX.4.64.0704181304250.25880@alien.or.mcafeemobile.com>
Date:	Wed, 18 Apr 2007 13:07:59 -0700 (PDT)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Ingo Molnar <mingo@...e.hu>, Matt Mackall <mpm@...enic.com>,
	Nick Piggin <npiggin@...e.de>,
	William Lee Irwin III <wli@...omorphy.com>,
	Peter Williams <pwil3058@...pond.net.au>,
	Mike Galbraith <efault@....de>,
	Con Kolivas <kernel@...ivas.org>, ck list <ck@....kolivas.org>,
	Bill Huey <billh@...ppy.monkey.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	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 Wed, 18 Apr 2007, Linus Torvalds wrote:

> For example, maybe we can approximate it by spreading out the statistics: 
> right now you have things like
> 
>  - last_ran, wait_runtime, sum_wait_runtime..
> 
> be per-thread things. Maybe some of those can be spread out, so that you 
> put a part of them in the "struct vm_struct" thing (to approximate 
> processes), part of them in the "struct user" struct (to approximate the 
> user-level thing), and part of it in a per-container thing for when/if we 
> support that kind of thing?

I think Ingo's idea of a new sched_group to contain the generic 
parameters needed for the "key" calculation, works better than adding more 
fields to existing strctures (that would, of course, host pointers to it). 
Otherwise I can already the the struct_signal being the target for other 
unrelated fields :)



- Davide


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