linux-kernel - Re: RAS trace event proto

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Date:	Wed, 22 Feb 2012 16:59:48 +0100
From:	Borislav Petkov <bp@...64.org>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	edac-devel <linux-edac@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: RAS trace event proto

On Wed, Feb 22, 2012 at 11:43:24AM +0100, Borislav Petkov wrote:
> This will keep the bloat level to a minimum, keep the TPs apart and
> hopefully make all of us happy :).

Btw, here's how the rough MCE TP trace_mce_record() looks like:

       mcegen.py-2715  [001] .N..  1049.818840: mce_record: [Hardware Error]: CPU:0     MC4_STATUS[Over|UE|-|PCC|AddrV|UECC]: 0xf604a00006080a41
[Hardware Error]:       MC4_ADDR: 0xbabedeaddeadbeef
[Hardware Error]: Northbridge Error (node 0): DRAM ECC error detected
(CPU: 0, MCGc/s: 0/0, MC4: f604a00006080a41, ADDR/MISC: babedeaddeadbeef/dead57ac1ba0babe, RIP: 00:<0000000000000000>, TSC: 0, PROCESSOR: 0:0, TIME: 0, SOCKET: 0, APIC: 0)

Basically, the userspace daemon will consume the error string (after
it's been massaged into looking prettier and smaller :-)) (1st arg)
and dump it to some logs, and use some of the MCE fields to do error
collection and thresholding/ratelimiting/whatever.

While at it, I'm also looking very critically at the fields SOCKET,
APIC, TSC (we have walltime) for I'd like to drop them. Also, MC4 should
be MC4_STATUS btw.

To be continued...

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
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