linux-kernel - Re: exclusive cpusets broken with cpu hotplug

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Message-Id: <20061019011152.752f9657.pj@sgi.com>
Date:	Thu, 19 Oct 2006 01:11:52 -0700
From:	Paul Jackson <pj@....com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	holt@....com, suresh.b.siddha@...el.com, dino@...ibm.com,
	menage@...gle.com, Simon.Derr@...l.net,
	linux-kernel@...r.kernel.org, mbligh@...gle.com,
	rohitseth@...gle.com, dipankar@...ibm.com
Subject: Re: exclusive cpusets broken with cpu hotplug

> Paul Jackson wrote:
> > Nick wrote:
> > 
> >>(we simply shouldn't allow
> >>situations where we put a partition in the middle of a cpuset).
> > 
> > 
> > Could you explain to me what you mean by "put a partition in the
> > middle of a cpuset?"
> > 
> 
> Your example, if a partition is created for each of the sub cpusets.

The thing "we simply shouldn't allow", then, is the bread and
butter of cpusets.

I am convinced that we are trying to pound nails with toothpicks.

The cpu_exclusive flag was the wrong flag to overload to define
sched domains.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.925.600.0401
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