tree 35075a8e1bdbfebe944c47e1235c5c1b19529c57
parent cb4dd729ee6ccc67ad604b1750990eb8c18783fa
author Dan Williams <dan.j.williams@intel.com> 1574012745 -0800
committer Dan Williams <dan.j.williams@intel.com> 1574185961 -0800

libnvdimm: Export the target_node attribute for regions and namespaces

Aneesh points out that some platforms may have "local" attached
persistent memory and "remote" persistent memory that map to the same
"online" node, or persistent memory devices with different performance
properties. In this case 'numa_node' is identical for the two instances,
but 'target_node' is differentiated so platform firmware can communicate
distinct performance properties per range. Expose 'target_node' by
default to allow for disambiguation of devices that share the same
numa_map_to_online_node() result.

Reported-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Link: https://lore.kernel.org/r/157401274500.43284.2369509941678577768.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>