linux-kernel - Re: [PATCH -v3] x86, MCE: Drop the default decoding notifier

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Message-ID: <4DA74548.7050702@redhat.com>
Date:	Thu, 14 Apr 2011 15:04:40 -0400
From:	Prarit Bhargava <prarit@...hat.com>
To:	Borislav Petkov <bp@...64.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Russ Anderson <rja@....com>,
	"Luck, Tony" <tony.luck@...el.com>,
	"dzickus@...hat.com" <dzickus@...hat.com>,
	"mstowe@...hat.com" <mstowe@...hat.com>,
	"dnelson@...hat.com" <dnelson@...hat.com>,
	"rja@...ricas.sgi.com" <rja@...ricas.sgi.com>
Subject: Re: [PATCH -v3] x86, MCE: Drop the default decoding notifier



On 04/14/2011 03:02 PM, Borislav Petkov wrote:
> On Thu, Apr 14, 2011 at 11:49:08AM -0400, Prarit Bhargava wrote:
>   
>>> And we don't want to fix that - we want to fix the case with the
>>> occasional CE MCEs which get detected in the polling path but none of
>>> their MCA regs get dumped for decoding so the decoding hint there is
>>> out of place. And we fixed that at least partially so that it doesn't
>>> flood the logs. If you're not fine with the default ratelimit of 10 msgs
>>> per 5 seconds we can always raise the ratelimit but tweaking an almost
>>> hypothetical case is just not worth it.
>>>
>>>       
>> Okay -- I'm good then.
>>     
> Ok, injecting MCEs with this patch looks like this. Nevermind the
> decoded MCEs, I simply uncommented the "if (ret != NOTIFY_DONE)" line
> so that I can see the rate limiting. So we still have them there, this
> is the default setting of 10 calls per 5 secs, we might want to dial it
> down in the output. After the 10th MCE, it doesn't appear anymore.
>
> Hmm...
>
> Prarit, you said you have a machine which spits a lot of CECCs on boot,
> does the final version help there, did you have a chance to run it?
>   

Yup -- it looked good and did what I expected it to do ... I didn't save
the output though :(

P.

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