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List:       linux-iommu
Subject:    DMAR:[fault reason 05] PTE Write access is not set
From:       markmc () redhat ! com (Mark McLoughlin)
Date:       2009-01-28 9:23:17
Message-ID: 1233134597.22103.6.camel () blaa
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On Tue, 2009-01-27 at 08:46 +1100, David Woodhouse wrote:
> On Mon, 2009-01-26 at 09:25 +0000, Mark McLoughlin wrote:
> > Hi,
> > 	intel_iommu was briefly enabled by default in Fedora rawhide.
> > 
> > 	One user reported lots of error spew like:
> > 
> >    DMAR:[DMA Write] Request device [03:00.0] fault addr fff8d000 
> >    DMAR:[fault reason 05] PTE Write access is not set
> > 
> > 	followed by filesystem corruption. We've made intel_iommu=off the
> > default now.
> > 
> > 	Details here:
> > 
> >   https://bugzilla.redhat.com/328997
> > 
> > 	Any of the maintainers interested in working with the reporter to sort
> > this out?
> 
> That'll probably be me... when I get home next week. Will try to look at
> it sooner.

Thanks.

We now have two reports of "PTE Write access is not set" issues on
Lenovo x200 and also a "Present bit in root entry is clear" issue on a
Dell Precision T5400. Both have logs in the bug above.

Cheers,
Mark.


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