> Which in turn enables the iommu_merge functionality in gart_map_sg(). > for_each_sg(sg, s, nents, i) { Hmm, another thought. Maybe this code just has trouble with the new linked SG lists and it's not really a SB600 problem? I did a quick test on two ATI machines with older chipset and iommu=force,merge and it didn't show a problem though. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html