linux-kernel - dmesg full of DMAR errors

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Message-ID: <j83rs1$mg1$1@dough.gmane.org>
Date:	Mon, 24 Oct 2011 16:17:37 +0200
From:	Sven Köhler <sven.koehler@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: dmesg full of DMAR errors

Hi,

I'm facing the same problems as described in
https://bugzilla.redhat.com/show_bug.cgi?id=605888

I'm not sure what the conclusion of the bugzilla discussion is:
1) you decided to not workaround the bug and I should disable VT-d instead
2) you decided to workaround the bug by blacklisting device IDs


The messages are:

DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000
DRHD: handling fault status reg 2


The devices in question are:
04:00.0 SD Host controller: Ricoh Co Ltd MMC/SD Host Controller (rev 03)
04:00.4 FireWire (IEEE 1394): Ricoh Co Ltd FireWire Host Controller (rev 03)

or
04:00.0 0805: 1180:e822 (rev 03)
04:00.4 0c00: 1180:e832 (rev 03)


Product ID 0xe832 is not mentioned in the bug. Maybe it has not been
blacklisted if you went for (2)?



Regards,
  Sven Köhler


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