Messages in this thread | | | Subject | Re: [RFC patch] return early if all dmar HW unit ignored | From | David Woodhouse <> | Date | Tue, 04 Aug 2009 08:09:54 +0100 |
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On Fri, 2009-07-31 at 16:29 +0800, Luming Yu wrote: > Hello list, > > When debugging an IOMMU problem, I noticed it should be much more safe > to return early than late if all remapping HW unit are ignored. > To figure out what device causes the iommu problem on my linux box: > hp-compaq dc7800, I tried to mark all dmar HW > unit ignored,but still got a lot of unxepcted dmar_fault. So I think > the proposed patch make sense. The next step is to > add a boot option to make dmar HW units selectable enable/disable individually.
Why were you seeing faults if all dmar units were ignored? Surely that shouldn't happen?
This patch doesn't make a lot of sense on its own -- can you show what you were intending to do as the 'next step'?
-- David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation
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