Re: [HMM v14 05/16] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory

From: Dave Hansen
Date: Thu Dec 08 2016 - 11:22:08 EST


On 12/08/2016 08:39 AM, JÃrÃme 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?