GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 07:12:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

libnvdimm, pmem: direct map legacy pmem by default

Browse source 
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>
This commit is contained in:
Dan Williams 2015-08-24 19:20:23 -04:00
parent 32ab0a3f51
commit 004f1afbe1
6 changed files with 50 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/linux/libnvdimm.h
View file

@ -31,6 +31,9 @@ enum {
ND_CMD_ARS_STATUS_MAX = SZ_4K,
ND_MAX_MAPPINGS = 32,
/* region flag indicating to direct-map persistent memory by default */
ND_REGION_PAGEMAP = 0,
/* mark newly adjusted resources as requiring a label update */
DPA_RESOURCE_ADJUSTED = 1 << 0,
};
@ -91,6 +94,7 @@ struct nd_region_desc {
void *provider_data;
int num_lanes;
int numa_node;
unsigned long flags;
};
struct nvdimm_bus;