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

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Message-Id: <1156269931.4954.12.camel@Homer.simpson.net>
Date:	Tue, 22 Aug 2006 18:05:31 +0000
From:	Mike Galbraith <efault@....de>
To:	vatsa@...ibm.com
Cc:	Ingo Molnar <mingo@...e.hu>, Nick Piggin <nickpiggin@...oo.com.au>,
	Sam Vilain <sam@...ain.net>, linux-kernel@...r.kernel.org,
	Kirill Korotaev <dev@...nvz.org>,
	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 7/7] CPU controller V1 - (temporary) cpuset interface

On Tue, 2006-08-22 at 19:20 +0530, Srivatsa Vaddagiri wrote:
> On Tue, Aug 22, 2006 at 03:45:05PM +0000, Mike Galbraith wrote:
> > > With only cpu 1 in the cpuset, it worked.
> > 
> > P.S.  since it worked, (and there are other tasks that I assigned on it,
> > kthreads for example, I only assigned the one shell), I figured I'd try
> > adding the other cpu and see what happened.  It let me hot add cpu 0,
> > but tasks continue to be run only on cpu 1.
> 
> How did you add the other cpu? to the "all" cpuset? I don't think I am
> percolating the changes to "cpus" field of parent to child cpuset, which
> may explain why tasks continue to run on cpu0. Achieving this change
> atomically for all child cpusets again is something I don't know whether
> cpuset code can handle well.

I just did echo "0-1" > cpus.

	-Mike

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