linux-kernel - Re: [RFC, PATCH 0/5] Going forward with Resource Management

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Date:	Fri, 4 Aug 2006 00:13:42 -0700
From:	Andrew Morton <akpm@...l.org>
To:	vatsa@...ibm.com
Cc:	mingo@...e.hu, nickpiggin@...oo.com.au, sam@...ain.net,
	linux-kernel@...r.kernel.org, dev@...nvz.org, efault@....de,
	balbir@...ibm.com, sekharan@...ibm.com, nagar@...son.ibm.com,
	haveblue@...ibm.com, pj@....com
Subject: Re: [RFC, PATCH 0/5] Going forward with Resource Management - A cpu
 controller

On Fri, 4 Aug 2006 12:26:15 +0530
Srivatsa Vaddagiri <vatsa@...ibm.com> wrote:

> On Thu, Aug 03, 2006 at 10:36:50PM -0700, Andrew Morton wrote:
> > ug, I didn't know this.  Had I been there (sorry) I'd have disagreed with
> > this whole strategy.
> > 
> > I thought the most recently posted CKRM core was a fine piece of code.  It
> > provides the machinery for grouping tasks together and the machinery for
> > establishing and viewing those groupings via configfs, and other such
> > common functionality.  My 20-minute impression was that this code was an
> > easy merge and it was just awaiting some useful controllers to come along.
> > 
> > And now we've dumped the good infrastructure and instead we've contentrated
> > on the controller, wired up via some imaginative ab^H^Hreuse of the cpuset
> > layer.
> 
> Andrew,
> 	CPUset was used in this patch series primarily because it
> represent a task-grouping mechanism already in the kernel and because
> people at the BoF wanted to start with something simple. The idea of using 
> cpusets here was not to push this as a final solution, but use it as a means to 
> discuss the effects of task-grouping on CPU scheduler.

OK.

> We had be more than happy to work with the ckrm core which was posted last.
> In fact I had sent out the same cpu controller against ckrm core itself last
> time around to Nick/Ingo.

Yup.

Please don't let me derail the main intent of this work - to make some progress
on the CPU controller.

There was a lot of discussion last time - Mike, Ingo, others.  It would be
a useful starting point if we could be refreshed on what the main issues
were, and whether/how this new patchset addresses them.

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