linux-kernel - Re: [PATCH v3 4/9] ACPI, x86: Extended error log driver for x86 platform

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Message-ID: <20140627221439.GA21418@pd.tnic>
Date:	Sat, 28 Jun 2014 00:14:39 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Xie XiuQi <xiexiuqi@...wei.com>,
	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	"Chen, Gong" <gong.chen@...ux.intel.com>,
	"joe@...ches.com" <joe@...ches.com>,
	"m.chehab@...sung.com" <m.chehab@...sung.com>,
	"arozansk@...hat.com" <arozansk@...hat.com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Li Bin <huawei.libin@...wei.com>
Subject: Re: [PATCH v3 4/9] ACPI, x86: Extended error log driver for x86
 platform

On Fri, Jun 27, 2014 at 10:10:48PM +0000, Luck, Tony wrote:
> I spoke too quickly. The only MCE for which we have recovery code are
> those that hit in application code. So the processor that is trying to
> do the printk() can't possibly be holding the locks. Other processors
> might have held the lock at the time of the MCE - but they have all
> returned from the handler at the time we try the printk - so they will
> make progess and release the lock so that we can acquire it.

That could explain why we're not seeing hangs left and right. :-)

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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