linux-kernel - Re: [PATCH 5/6] perf: Optimise topology iteration

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Message-ID: <20110220211512.GT5818@one.firstfloor.org>
Date:	Sun, 20 Feb 2011 22:15:12 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/6] perf: Optimise topology iteration

On Mon, Feb 21, 2011 at 12:57:39AM +0800, Lin Ming wrote:
> Currently we iterate the full machine looking for a matching core_id/nb
> for the percore and the amd northbridge stuff , using a smaller topology
> mask makes sense.

This is still wrong for CPU hotplug. The CPU "owning" the per core
does not necessarily need to be online anymore.
Please drop this patch.

-Andi
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