linux-kernel - Re: [PATCH -v2] x86, MCE: Drop default decoding notifier

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Date:	Wed, 13 Apr 2011 13:01:00 -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 -v2] x86, MCE: Drop default decoding notifier


> @@ -239,7 +227,9 @@ static void print_mce(struct mce *m)
>  	 * Print out human-readable details about the MCE error,
>  	 * (if the CPU has an implementation for that)
>  	 */
> -	atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, m);
> +	ret = atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, m);
> +	if (ret != NOTIFY_STOP)
> +		pr_emerg(HW_ERR "Run the above through 'mcelog --ascii' to decode.\n");
>  }
>   

Borislav,

I still think you need the check for UC here.  When an UC occurs and
mce_panic() is called the output will include:

[Hardware Error]:  Run the above through 'mcelog --ascii' to decode.

potentially many, many times.  The problem still is that there is no
output to decode (in the default case).

P.
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