On Mon, Jan 17, 2011 at 05:08:42PM +0000, Prasad Joshi wrote: > >> [ 13.132547] AMD-Vi: Event logged [IO_PAGE_FAULT device=06:00.1 domain=0x0000 address=0x00000000bb402000 flags=0x0050] Ok, the problem is, that the device 06:00.1 is not described in the ACPI table for the IOMMU driver. So the driver does not feel responsible for it and does not create mappings. It just blocks all DMA from that device which results in the IO_PAGE_FAULT you have seen. You will not be able to use the IDE controler in DMA mode, so if you attach any drives to it you are sticked to slow PIO access mode. The problem was already seen by another person and he reported the issue to the board manufacturer to get a new BIOS where this issue is fixed. Regards, Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
