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| author |   Dan Williams <dan.j.williams@intel.com> | 2015-05-31 15:02:11 -0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-24 21:24:10 -0400 |
| commit | 3d88002e4a7bd40f355550284c6cd140e6fe29dc (patch) | |
| tree | 5934604ed6e21153ada873c7042c4037ef20ecdc /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | libnvdimm, nfit: regions (block-data-window, persistent memory, volatile memory) (diff) | |
| download | wireguard-linux-3d88002e4a7bd40f355550284c6cd140e6fe29dc.tar.xz wireguard-linux-3d88002e4a7bd40f355550284c6cd140e6fe29dc.zip | |
libnvdimm: support for legacy (non-aliasing) nvdimms
The libnvdimm region driver is an intermediary driver that translates
non-volatile "region"s into "namespace" sub-devices that are surfaced by
persistent memory block-device drivers (PMEM and BLK).
ACPI 6 introduces the concept that a given nvdimm may simultaneously
offer multiple access modes to its media through direct PMEM load/store
access, or windowed BLK mode. Existing nvdimms mostly implement a PMEM
interface, some offer a BLK-like mode, but never both as ACPI 6 defines.
If an nvdimm is single interfaced, then there is no need for dimm
metadata labels. For these devices we can take the region boundaries
directly to create a child namespace device (nd_namespace_io).
Acked-by: Christoph Hellwig <hch@lst.de>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
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