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Date: Tue, 17 Apr 2007 11:36:00 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Peter Williams <pwil3058@bigpond.net.au>
Cc: Nick Piggin <npiggin@suse.de>,
       "Michael K. Edwards" <medwards.linux@gmail.com>,
       William Lee Irwin III <wli@holomorphy.com>,
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       Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Mike Galbraith <efault@gmx.de>, Arjan van de Ven <arjan@infradead.org>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]
Message-ID: <20070417093600.GA22626@elte.hu>
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* Peter Williams <pwil3058@bigpond.net.au> wrote:

> There's a lot of ugly code in the load balancer that is only there to 
> overcome the side effects of SMT and dual core.  A lot of it was put 
> there by Intel employees trying to make load balancing more friendly 
> to their systems.  What I'm suggesting is that an N CPUs per runqueue 
> is a better way of achieving that end.  I may (of course) be wrong but 
> I think that the idea deserves more consideration than you're willing 
> to give it.

i actually implemented that some time ago and i'm afraid it was ugly as 
hell and pretty fragile. Load-balancing gets simpler, but task picking 
gets alot uglier.

	Ingo