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| author | Dan Williams <dan.j.williams@intel.com> | 2016-03-11 10:15:36 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-05-09 15:35:42 -0700 |
| commit | cd03412a51ac4cb3001a8cdfae4560c9602f3387 (patch) | |
| tree | c2d501759d7d96fab9a0f70eefba139876bb12de /drivers/nvdimm/Kconfig | |
| parent | 0bfb8dd3edd6e423b5053c86e10c97e92cf205ea (diff) | |
| download | lwn-cd03412a51ac4cb3001a8cdfae4560c9602f3387.tar.gz lwn-cd03412a51ac4cb3001a8cdfae4560c9602f3387.zip | |
libnvdimm, dax: introduce device-dax infrastructure
Device DAX is the device-centric analogue of Filesystem DAX
(CONFIG_FS_DAX). It allows persistent memory ranges to be allocated and
mapped without need of an intervening file system. This initial
infrastructure arranges for a libnvdimm pfn-device to be represented as
a different device-type so that it can be attached to a driver other
than the pmem driver.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/Kconfig')
| -rw-r--r-- | drivers/nvdimm/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig index 53c11621d5b1..7c8a3bf07884 100644 --- a/drivers/nvdimm/Kconfig +++ b/drivers/nvdimm/Kconfig @@ -88,4 +88,17 @@ config NVDIMM_PFN Select Y if unsure +config NVDIMM_DAX + bool "NVDIMM DAX: Raw access to persistent memory" + default LIBNVDIMM + depends on NVDIMM_PFN + help + Support raw device dax access to a persistent memory + namespace. For environments that want to hard partition + peristent memory, this capability provides a mechanism to + sub-divide a namespace into character devices that can only be + accessed via DAX (mmap(2)). + + Select Y if unsure + endif |