linux-kernel - Re: [PATCH] NMI: fix NMI period is not correct when cpu frequency changes issue.

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Date:	Thu, 18 Apr 2013 13:32:09 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Pan, Zhenjie" <zhenjie.pan@...el.com>,
	"paulus@...ba.org" <paulus@...ba.org>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"acme@...stprotocols.net" <acme@...stprotocols.net>,
	"dzickus@...hat.com" <dzickus@...hat.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"Liu, Chuansheng" <chuansheng.liu@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH] NMI: fix NMI period is not correct when cpu frequency
 changes issue.

On Mon, 2013-04-15 at 16:30 -0700, Andrew Morton wrote:
> I think this will break the build if CONFIG_PERF_EVENTS=n and
> CONFIG_LOCKUP_DETECTOR=y.  I was able to create such a config for
> powerpc.  If I'm reading it correctly, CONFIG_PERF_EVENTS cannot be
> disabled on x86_64?  If so, what the heck?

Frederic and Ingo made that happen,.. a long while ago Frederic
promised to fix that.. I suppose its never been quite important enough
to get around to :/

(Frederic; read this as a gentle prod to move his upward on the todo
list)

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