diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2016-03-03 09:38:00 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-03-05 12:25:45 -0800 |
| commit | cfe30b872058f211630eda7f65fb19d83beaaa3c (patch) | |
| tree | 44dd4131a1dd92ef45babff885cb6add604746a9 /drivers/nvdimm/namespace_devs.c | |
| parent | d9cbe09d39aa13f6924dc5fb88325de7ef01a72e (diff) | |
| download | lwn-cfe30b872058f211630eda7f65fb19d83beaaa3c.tar.gz lwn-cfe30b872058f211630eda7f65fb19d83beaaa3c.zip | |
libnvdimm, pmem: adjust for section collisions with 'System RAM'
On a platform where 'Persistent Memory' and 'System RAM' are mixed
within a given sparsemem section, trim the namespace and notify about the
sub-optimal alignment.
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/namespace_devs.c')
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 9edf7eb7d17c..f5cb88601359 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -133,6 +133,7 @@ bool nd_is_uuid_unique(struct device *dev, u8 *uuid) bool pmem_should_map_pages(struct device *dev) { struct nd_region *nd_region = to_nd_region(dev->parent); + struct nd_namespace_io *nsio; if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) return false; @@ -143,6 +144,12 @@ bool pmem_should_map_pages(struct device *dev) if (is_nd_pfn(dev) || is_nd_btt(dev)) return false; + nsio = to_nd_namespace_io(dev); + if (region_intersects(nsio->res.start, resource_size(&nsio->res), + IORESOURCE_SYSTEM_RAM, + IORES_DESC_NONE) == REGION_MIXED) + return false; + #ifdef ARCH_MEMREMAP_PMEM return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; #else |