On 25/04/17 05:58 AM, Marta Rybczynska wrote: > I would add one issue that doesn't seem to be addressed: in my experience > P2P doesn't work when IOMMU activated. It works best with deactivation at > the BIOS level, even the kernel options are not enough in some cases. Well this would likely be addressed by 'arch_p2p_cross_segment' as proposed by Jason. Logan