linux-kernel - Re: CPU isolation question again

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Message-ID: <20120703112828.GA28294@somewhere>
Date:	Tue, 3 Jul 2012 13:28:31 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Luming Yu <luming.yu@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, gilad@...yossef.com
Subject: Re: CPU isolation question again

On Wed, Jun 27, 2012 at 09:22:09PM +0800, Luming Yu wrote:
> Hi there,
> 
> I noticed some discussion about CPU isolation which points me to the
> patch set (https://lkml.org/lkml/2011/8/15/245). I'm currently
> preparing a RFC-patch-set to automatically pick up a few suitable CPUs
> to isolate then kick them out of service for a while. We need to
> balance between  thermal & power management And overall system
> performance during this operation as much as possible. So
> software-cpu-online-offline interface could not be a good option to
> me. But to make sure I'm not blindly running on a dead-end path, I'd
> check with experts here to ensure it makes some sense to isolate CPUs
> to this level, and the idea also makes some sense, and the most
> important is it's not implemented yet.

I don't understand what you are trying to do and how exactly. How do you
plan to do this isolation and how do you want to balance between thermal
and power?
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