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From: Paul Jackson <pj@sgi.com>
To: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: nickpiggin@yahoo.com.au, akpm@osdl.org, mbligh@google.com,
	menage@google.com, Simon.Derr@bull.net,
	linux-kernel@vger.kernel.org, dino@in.ibm.com,
	rohitseth@google.com, holt@sgi.com, dipankar@in.ibm.com,
	suresh.b.siddha@intel.com, clameter@sgi.com
Subject: Re: [RFC] cpuset: add interface to isolated cpus
Date: Fri, 20 Oct 2006 18:33:24 -0700	[thread overview]
Message-ID: <20061020183324.b29caa37.pj@sgi.com> (raw)
In-Reply-To: <20061020135944.B8481@unix-os.sc.intel.com>

Suresh wrote:
> Its just a corner case issue that Nick didn't consider while doing a quick
> patch. Nick meant to partition the sched domain at the top
> exclusive cpuset and he probably missed the case where root cpuset is marked
> as exclusive.

This makes no sense.

If P is a partition of S, that means that P is a set of subsets of
S such that the intersection of any two members of P is empty, and
the union of the members of P equals S.

If P is a partition of S, then adding S itself to P as another member
makes P no longer a partion, for then every element of S is in two
elements of P, not one.

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

  reply	other threads:[~2006-10-21  1:33 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-19  9:26 [RFC] cpuset: add interface to isolated cpus Paul Jackson
2006-10-19 10:17 ` Nick Piggin
2006-10-19 17:55   ` Paul Jackson
2006-10-19 18:07     ` Nick Piggin
2006-10-19 18:56       ` Paul Jackson
2006-10-19 19:03         ` Nick Piggin
2006-10-20  3:37           ` Paul Jackson
2006-10-20  8:02             ` Nick Piggin
2006-10-20 14:52               ` Nick Piggin
2006-10-20 20:03                 ` Paul Jackson
2006-10-20 19:59               ` Paul Jackson
2006-10-20 20:01               ` Paul Jackson
2006-10-20 20:59                 ` Siddha, Suresh B
2006-10-21  1:33                   ` Paul Jackson [this message]
2006-10-21  6:14                 ` Nick Piggin
2006-10-21  7:24                   ` Paul Jackson
2006-10-21 10:51                     ` Nick Piggin
2006-10-22  4:54                       ` Paul Jackson
2006-10-20 21:04 ` Dinakar Guniguntala
2006-10-23  3:18   ` Paul Jackson
2006-10-23  5:07     ` Nick Piggin
2006-10-23  5:51       ` Paul Jackson
2006-10-23  5:40         ` Siddha, Suresh B
2006-10-23  6:06           ` Paul Jackson
2006-10-23  6:07           ` Paul Jackson
2006-10-23  6:17         ` Nick Piggin
2006-10-23  6:41           ` Paul Jackson
2006-10-23  6:49             ` Nick Piggin
2006-10-23  6:48           ` Paul Jackson
2006-10-23 20:58           ` Paul Jackson
2006-10-23 19:50       ` Dinakar Guniguntala
2006-10-23 20:47         ` Paul Jackson
2006-10-24 15:44           ` Paul Jackson
2006-10-25 19:40         ` Paul Jackson

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