Subject: Re: [PATCH] dmi_check_system can generate Warnings when no DMI
 table is present
From: Daniel Walker <dwalker@fifo99.com>
To: Erwan Velu <erwanaliasr1@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, Jeremy Fitzhardinge <jeremy@goop.org>,
       linux-kernel@vger.kernel.org, x86@kernel.org
In-Reply-To: <4AE19867.5070705@gmail.com>
References: <4AE178AF.3010804@gmail.com> <20091023110323.GC10071@elte.hu>
	 <4AE19867.5070705@gmail.com>
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Date: Fri, 23 Oct 2009 05:47:46 -0700
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On Fri, 2009-10-23 at 13:49 +0200, Erwan Velu wrote:
> Ingo Molnar a écrit :
> > Looks like a Xen bug. DMI matching functions should be called after that 
> > code has initialized. The warning was added to catch such early calls.
> >
> > Your patch works around that bug and the warning.
> >   
> So I think you'll drop it and we have to make xen people fix it ?

It's your defect, so you can still try to fix it (unless the "xen
people" or someone else beats you to it.) 

It looks like on a normal system dmi_scan_machine() gets called very
early in setup_arch() arch/x86/kernel/setup.c . A possible good fix
might be to add a dmi_disable() into the dmi driver that just shuts off
dmi, and run that in xen_arch_setup() in arch/x86/xen/setup.c .

Daniel


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