linux-kernel - RE: [patch 0/5] x86: mce: Bugfixes, cleanups and a new CMCI poll version

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F19304893@ORSMSX104.amr.corp.intel.com>
Date:	Thu, 7 Jun 2012 16:22:53 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Borislav Petkov <borislav.petkov@....com>,
	Chen Gong <gong.chen@...ux.intel.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: RE: [patch 0/5] x86: mce: Bugfixes, cleanups and a new CMCI poll
 version

> Stupid question: do you even want to allow offlining of CPUs while the
> storm is raging? IOW, wouldn't it be better to disallow hotplug when the
> storm happens so that all online CPUs, which is all CPUs on the system,
> can work out the storm conditions faster so that the system gets back to
> normal faster...

What if a processor is the source of the storm (we can get CMCI from
corrected errors in the cache)? Then our action to abate the storm would
be to take the cpu offline.

-Tony
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