tree 4c7df96fc10599da6f31639a1835a8ada97ef2d8
parent 32ab0a3f51701cb37ab960635254d5f84ec3de0a
author Dan Williams <dan.j.williams@intel.com> 1440458423 -0400
committer Dan Williams <dan.j.williams@intel.com> 1440819605 -0400

libnvdimm, pmem: direct map legacy pmem by default

The expectation is that the legacy / non-standard pmem discovery method
(e820 type-12) will only ever be used to describe small quantities of
persistent memory.  Larger capacities will be described via the ACPI
NFIT.  When "allocate struct page from pmem" support is added this default
policy can be overridden by assigning a legacy pmem namespace to a pfn
device, however this would be only be necessary if a platform used the
legacy mechanism to define a very large range.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>