linux-kernel - Re: [PATCH v7 2/2] x86 mce: use new printk recursion disabling interface

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Message-ID: <20120626204305.GA29439@aftab.osrc.amd.com>
Date:	Tue, 26 Jun 2012 22:43:06 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Ingo Molnar <mingo@...nel.org>, ShuoX Liu <shuox.liu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>,
	Yanmin Zhang <yanmin_zhang@...ux.intel.com>,
	"Luck, Tony" <tony.luck@...el.com>,
	"andi@...stfloor.org" <andi@...stfloor.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v7 2/2] x86 mce: use new printk recursion disabling
 interface

On Mon, Jun 25, 2012 at 03:14:21PM +0200, Peter Zijlstra wrote:
> That already does bust_spinlocks() which already increments the
> oops_in_progress thing, so WTF are you doing anyway?

Hmm, that's interesting. So Shuox said they hit this in some sort of
"MTBF testing on Android ATOM mobiles":

http://marc.info/?l=linux-kernel&m=133903834107577&w=2

And I'm guessing they want this probably because they set fake_panic so
that we don't bust_spinlocks() in mce_panic().

Shoux, Yanmin, what's the dealio here?

Thanks.

-- 
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Boris.

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