linux-kernel - Re: [PATCH 0/2] x86, MCE: Catch the early worm

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Message-ID: <20111209061601.GB24537@elte.hu>
Date:	Fri, 9 Dec 2011 07:16:01 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Borislav Petkov <bp@...64.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Tony Luck <tony.luck@...el.com>, X86-ML <x86@...nel.org>,
	EDAC devel <linux-edac@...r.kernel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: Re: [PATCH 0/2] x86, MCE: Catch the early worm


* Borislav Petkov <bp@...64.org> wrote:

> From: Borislav Petkov <borislav.petkov@....com>
> 
> Currently, we don't decode MCEs which are being detected during MCA
> initialization and before registration of the decoders on the decoding
> notifier chain. These two patches add the functionality to drain the
> mcelog buffer right after we've registered a decoder.
> 
> With it, early MCEs get caught and decoded into the dmesg:
> 
> ...
> [    0.068003] ... generic registers:      6
> [    0.068003] ... value mask:             0000ffffffffffff
> [    0.068003] ... max period:             00007fffffffffff
> [    0.068003] ... fixed-purpose events:   0
> [    0.068003] ... event mask:             000000000000003f
> [    0.068003] MCE: In-kernel MCE decoding enabled.
> [    0.068003] [Hardware Error]: CPU:0  MC0_STATUS[-|UE|MiscV|-|AddrV|-|-]: 0xac80000000000833
> [    0.068003] [Hardware Error]:        MC0_ADDR: 0x00000000f8080000
> [    0.068003] [Hardware Error]: Data Cache Error: System Read Data Error.
> [    0.068003] [Hardware Error]: cache level: L3/GEN, mem/io: MEM, mem-tx: DRD, part-proc: SRC (no timeout)
> [    0.068069] Booting Node   0, Processors  #1
> [    0.068276] smpboot cpu 1: start_ip = 88000
> [    0.160077]  #2
> [    0.160206] smpboot cpu 2: start_ip = 88000
> [    0.252073]  #3 Ok.
> ...
> 
> Comments and suggestions are welcome, as always.

Looks good to me.

Thanks,

	Ingo
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