linux-kernel - Re: [PATCH] dmi: export dmi data through debugfs

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Message-ID: <20100930195942.6780c7a6@endymion.delvare>
Date:	Thu, 30 Sep 2010 19:59:42 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Olof Johansson <olof@...om.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH] dmi: export dmi data through debugfs

Hi Andi,

On Thu, 30 Sep 2010 19:34:57 +0200, Andi Kleen wrote:
> Alan Cox <alan@...rguk.ukuu.org.uk> writes:
> 
> >> Now if you really insist on exposing the whole DMI table through sysfs,
> >> I can't prevent you from doing that. After all, ACPI already exposes
> >> its tables under /sys/firmware/acpi/tables (mode 0400). But then you'd
> >> rather expose the DMI entry point and tables
> >> under /sys/firmware/dmi/tables for consistency, rather than using
> >> debugfs. But again, I don't think it is adding any value over what we
> >> already have.
> >
> > If you really the DMI data generally available run dmidecode in the boot
> > scripts directed to a file. It even has a dump mode for this.
> 
> FWIW i have been pondering to put DMI into sysfs too. One of the reasons
> mcelog has to start up as root is that it needs to get these tables
> out of /dev/mem.
> 
> Just having a binary file to read would be fine though, no need to 
> do decoding.

Out of curiosity, what exactly does mcelog need out of the DMI data?

-- 
Jean Delvare
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