Messages in this thread | | | Date | Mon, 6 Jul 2009 15:11:56 +0200 | From | Joerg Roedel <> | Subject | Re: IOMMU and graphics cards |
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On Mon, Jul 06, 2009 at 01:26:17PM +0100, David Woodhouse wrote: > On Fri, 2009-05-08 at 11:35 +0200, Joerg Roedel wrote: > > The other way to achieve consistency is to remove the workaround from > > VT-d code which significantly increases the chance to get the broken > > stuff fixed. David? > > It's gone from 2.6.31-rc2, but even the in-tree drivers break, so I > think we have to put it back for 2.6.31 (I've sent Linus the pull > request already). > > I do intend to remove it again for 2.6.32 though, and I filed > http://bugzilla.kernel.org/show_bug.cgi?id=13721 > > For now it's got a clearer description ("Workaround broken graphics > drivers") and defaults to 'n'.
Ok, cool, that sounds good. Which in-kernel DRM drivers break with IOMMU for you? I'll may probably add a similar temporary workaround for AMD IOMMU too...
Joerg
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