linux-kernel - [RFC] cpuset: Remove sched domain hooks from cpusets

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Date:	Tue, 31 Oct 2006 02:56:15 +0530
From:	Dinakar Guniguntala <dino@...ibm.com>
To:	Paul Jackson <pj@....com>
Cc:	nickpiggin@...oo.com.au, akpm@...l.org, mbligh@...gle.com,
	menage@...gle.com, Simon.Derr@...l.net,
	linux-kernel@...r.kernel.org, rohitseth@...gle.com, holt@....com,
	dipankar@...ibm.com, suresh.b.siddha@...el.com
Subject: [RFC] cpuset:  Remove sched domain hooks from cpusets

Hi,

Remove the cpuset hooks that defined sched domains depending on the
setting of the 'cpu_exclusive' flag.

This patch is similar to what Paul Jackson had sent earlier, except that
since I am also attaching the alternative implementation in my next mail,
I didnt see the need to remove the API from sched.c

The existing cpuset code that partitioned sched domains at the
back of a exclusive cpuset has one major problem. Administrators
will find that tasks assigned to top level cpusets, that contain
child cpusets that are exclusive, can no longer be rebalanced across
the entire cpus_allowed mask. It was felt that instead of overloading
the cpu_exclusive flag to also create sched domains, it would be
better to have a separate flag that denotes a sched domain. That
way the admins have the flexibility to create exclusive cpusets
that do not necessarily define sched domains.

Signed-off-by: Dinakar Guniguntala <dino@...ibm.com>

View attachment "pj-rem.patch" of type "text/plain" (4077 bytes)