On 12/08/2016 08:39 AM, Jérôme Glisse wrote: > Architecture that wish to support un-addressable device memory should make > sure to never populate the kernel linar mapping for the physical range. Does the platform somehow provide a range of physical addresses for this unaddressable area? How do we know no memory will be hot-added in a range we're using for unaddressable device memory, for instance? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>