linux-kernel - Re: [RFC] scheduler: improve SMP fairness in CFS

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Message-Id: <1185297067.7737.5.camel@tongli.jf.intel.com>
Date:	Tue, 24 Jul 2007 10:11:07 -0700
From:	"Li, Tong N" <tong.n.li@...el.com>
To:	Chris Snook <csnook@...hat.com>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: [RFC] scheduler: improve SMP fairness in CFS

On Tue, 2007-07-24 at 04:07 -0400, Chris Snook wrote:

> To clarify, I'm not suggesting that the "balance with cpu (x+1)%n only" 
> algorithm is the only way to do this.  Rather, I'm pointing out that 
> even an extremely simple algorithm can give you fair loading when you 
> already have CFS managing the runqueues.  There are countless more 
> sophisticated ways we could do this without using global locking, or 
> possibly without any locking at all, other than the locking we already 
> use during migration.
> 
> 	-- Chris

Yes, as Andi and Chris also pointed out, I'll think about if global
synchronization can be removed or relaxed.

Thanks,

  tong
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