linux-kernel - Re: next-20130709 DMAR issues

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Message-ID: <22464.1374012998@turing-police.cc.vt.edu>
Date:	Tue, 16 Jul 2013 18:16:38 -0400
From:	Valdis.Kletnieks@...edu
To:	"Li, Zhen-Hua" <zhen-hual@...com>
Cc:	Joerg Roedel <joro@...tes.org>, Ingo Molnar <mingo@...nel.org>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: next-20130709 DMAR issues

On Mon, 15 Jul 2013 10:32:17 +0800, "Li, Zhen-Hua" said:
> I have met a bug with the same error message, its cause was that the bios
> did not allocate RMRR/DRHD(can't remember which one) for the device.

I think I posted a link to that same bug report.  The problem is that
if the BIOS wasn't allocating it before, it isn't allocating it now,
because it's still the same A11 bios that Dell shipped it with.  And now
I'm not sure which is more confusing - that it was OK in -0703 and borked
in -0709, or that between two successive boots of the same -0709 kernel
it cleared itself up....

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