linux-kernel - Re: x86/mce: machine check warning during poweroff

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Message-ID: <4F10A0FD.9040504@linux.intel.com>
Date:	Fri, 13 Jan 2012 13:24:13 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Ming Lei <tom.leiming@...il.com>,
	Djalal Harouni <tixxdz@...ndz.org>,
	Borislav Petkov <borislav.petkov@....com>,
	Tony Luck <tony.luck@...el.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Kay Sievers <kay.sievers@...y.org>,
	gouders@...bocholt.fh-gelsenkirchen.de,
	Marcos Souza <marcos.mage@...il.com>,
	Linux PM mailing list <linux-pm@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	prasad@...ux.vnet.ibm.com, justinmattock@...il.com,
	Jeff Chua <jeff.chua.linux@...il.com>
Subject: Re: x86/mce: machine check warning during poweroff


> Yes, I think you're hitting the exact same thing.
>
> I *think* that what is going on is that we free some data structure
> too early, and we didn't use to free them before.

Assuming the problem is with the multiple devices (not fully sure):

The redundant devices don't make much sense anyways, they are all 
mirrors of each other
(state changes always affect all CPUs)  Could just collapse down to a 
single device and symlink
the others.

-Andi

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