linux-kernel - Re: [RFC Patch 5/6] slimdump: Capture slimdump for fatal MCE generated crashes

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Message-ID: <20110526173257.GC4065@one.firstfloor.org>
Date:	Thu, 26 May 2011 19:32:57 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"K.Prasad" <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,
	"Eric W. Biederman" <ebiederm@...ssion.com>, anderson@...hat.com
Subject: Re: [RFC Patch 5/6] slimdump: Capture slimdump for fatal MCE generated crashes

On Thu, May 26, 2011 at 10:53:05PM +0530, K.Prasad wrote:
> 
> slimdump: Capture slimdump for fatal MCE generated crashes
> 
> System crashes resulting from fatal hardware errors (such as MCE) don't need
> all the contents from crashing-kernel's memory. Generate a new 'slimdump' that
> retains only essential information while discarding the old memory.

While this is a good idea, note there may be still poisoned lines
in memory that haven't resulted in a machine check yet, but could
still be fatal when read after a full crash dump for some other
reason.

So you still need 

http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=fe61906edce9e70d02481a77a617ba1397573dce
and
http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=cb58f049ae6709ddbab71be199390dc6852018cd

in addition.

-Andi
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