Re: [PATCH] mm: add ZONE_DEVICE statistics to smaps

[Anshuman Khandual]

On 11/11/2016 03:41 AM, Dan Williams wrote:
> ZONE_DEVICE pages are mapped into a process via the filesystem-dax and
> device-dax mechanisms.  There are also proposals to use ZONE_DEVICE
> pages for other usages outside of dax.  Add statistics to smaps so
> applications can debug that they are obtaining the mappings they expect,
> or otherwise accounting them.

This might also help when we will have ZONE_DEVICE based solution for
HMM based device memory.