linux-kernel - Re: [PATCH 1/7] CPU controller V1

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Message-ID: <44F2E216.7090300@yahoo.com.au>
Date:	Mon, 28 Aug 2006 22:31:18 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	vatsa@...ibm.com
CC:	Kirill Korotaev <dev@...ru>, Ingo Molnar <mingo@...e.hu>,
	Sam Vilain <sam@...ain.net>, linux-kernel@...r.kernel.org,
	Kirill Korotaev <dev@...nvz.org>,
	Mike Galbraith <efault@....de>,
	Balbir Singh <balbir@...ibm.com>, sekharan@...ibm.com,
	Andrew Morton <akpm@...l.org>, nagar@...son.ibm.com,
	matthltc@...ibm.com, dipankar@...ibm.com
Subject: Re: [PATCH 1/7] CPU controller V1 - split runqueue

Srivatsa Vaddagiri wrote:
> On Mon, Aug 28, 2006 at 12:15:40PM +0400, Kirill Korotaev wrote:
>>When I talked with Nick Piggin on summit he was quite optimistic
>>with such an approach. And again, this invasiveness is very simple
>>so I do not forsee much objections.
> 
> 
> Ingo/Nick, what do you think? If we decide that is a usefull thing to
> try, I can see how these mechanisms will be usefull for general SMP
> systems too (w/o depending on resource management).

I still haven't had much time to look at the implementation, but this
design seems cleanest I've considered, IMO.

Of course I would really hope we don't need any special casing in the
SMP balancing (which may be the tricky part). However hopefully if
things don't work well in that department, they can be made to by
improving the core code to be more general rather than special casing.

Do you have a better (/another) idea for the design?

-- 
SUSE Labs, Novell Inc.
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