[Xen-bugs] [Bug 168] kernel BUG at arch/xen/i386/kernel/pci-dma.c:30 (iommu_bug)!

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=168





------- Additional Comments From ian.pratt@xxxxxxxxxxxx  2005-08-19 19:32 
-------


> dma_mask is ffffffff
> dma_addr is 80011eb7000
> Fatal DMA error! Please use 'swiotlb=force'
> kernel BUG at arch/xen/i386/kernel/pci-dma.c:63 (dma_map_sg)!

Hmm, I suspect an NX bit is getting read out of a PTE and not being masked. 

Do you get any "bad L1 flags 8000000" messages when the machine boots?








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