linux-kernel - Re: [PATCH -tip 3/3] x86, mce: Add mce=nopoll option to disable timer polling

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Message-ID: <49D1D149.3040505@linux.intel.com>
Date:	Tue, 31 Mar 2009 10:16:09 +0200
From:	Andi Kleen <ak@...ux.intel.com>
To:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH -tip 3/3] x86, mce: Add mce=nopoll option to disable timer
 polling

Hidetoshi Seto wrote:
> Andi Kleen wrote:
>>> How to prevent banks from clearing?
>> Firmware first typically means the firmware gets it one way or another
>> using SMI and that tends to work even when the OS clears because
>> SMI comes first. So stopping the clearing is probably not needed?
> 
> SMI is not only way for firmware.
> IIRC, I heard there are some server doing poll from service processor on
> BMC (Board Management Controller).
> I could be wrong, but always there could be a special case.

I see. In this case you likely want to shut off boot logging too
(mce=nobootlog)

-Andi

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