linux-kernel - Re: [PATCH] x86/mce: Fix initialization error warning

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Date:   Mon, 16 Jan 2017 17:06:02 -0500
From:   Prarit Bhargava <prarit@...hat.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     linux-kernel@...r.kernel.org, Tony Luck <tony.luck@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-edac@...r.kernel.org
Subject: Re: [PATCH] x86/mce: Fix initialization error warning



On 01/16/2017 04:56 PM, Borislav Petkov wrote:
> On Mon, Jan 16, 2017 at 04:49:41PM -0500, Prarit Bhargava wrote:
>> When booting kernel with mce=off a loud warning from the mce code
>> is displayed.  This causes confusion for end users.
> 
> Is this what you call a loud warning?
> 
> [    1.885648] mce: Unable to init device /dev/mcelog (rc: -5)

Yes, it was loud enough to generate a bug report from a user.

FWIW, I just found this from last year calling the same message "scary".  It
doesn't look like there was a follow up though.

https://lkml.org/lkml/2016/2/9/354

P.

>