linux-kernel - Re: [RFC Patch 4/6] PANIC_MCE: Introduce a new panic flag for fatal MCE, capture related information

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Message-ID: <m1fwo09g15.fsf@fess.ebiederm.org>
Date:	Fri, 27 May 2011 11:04:06 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	prasad@...ux.vnet.ibm.com
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>,
	"Luck\, Tony" <tony.luck@...el.com>,
	Vivek Goyal <vgoyal@...hat.com>, kexec@...ts.infradead.org,
	anderson@...hat.com
Subject: Re: [RFC Patch 4/6] PANIC_MCE: Introduce a new panic flag for fatal MCE, capture related information

"K.Prasad" <prasad@...ux.vnet.ibm.com> writes:

> PANIC_MCE: Introduce a new panic flag for fatal MCE, capture related information
>
> Fatal machine check exceptions (caused due to hardware memory errors) will now
> result in a 'slim' coredump that captures vital information about the MCE. This
> patch introduces a new panic flag, and new parameters to *panic functions
> that can capture more information pertaining to the cause of crash.
>
> Enable a new elf-notes section to store additional information about the crash.
> For MCE, enable a new notes section that captures relevant register status
> (struct mce) to be later read during coredump analysis.

There may be a reason to pass everything struct mce through 5 layers of
code but right now it looks like it just makes everything uglier to no
real purpose.

Eric
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