diff options
Diffstat (limited to 'drivers/dax/Kconfig')
| -rw-r--r-- | drivers/dax/Kconfig | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig index e0700bf4893a..5ef624fe3934 100644 --- a/drivers/dax/Kconfig +++ b/drivers/dax/Kconfig @@ -23,12 +23,38 @@ config DEV_DAX config DEV_DAX_PMEM tristate "PMEM DAX: direct access to persistent memory" depends on LIBNVDIMM && NVDIMM_DAX && DEV_DAX + depends on m # until we can kill DEV_DAX_PMEM_COMPAT default DEV_DAX help Support raw access to persistent memory. Note that this driver consumes memory ranges allocated and exported by the libnvdimm sub-system. - Say Y if unsure + Say M if unsure + +config DEV_DAX_KMEM + tristate "KMEM DAX: volatile-use of persistent memory" + default DEV_DAX + depends on DEV_DAX + depends on MEMORY_HOTPLUG # for add_memory() and friends + help + Support access to persistent memory as if it were RAM. This + allows easier use of persistent memory by unmodified + applications. + + To use this feature, a DAX device must be unbound from the + device_dax driver (PMEM DAX) and bound to this kmem driver + on each boot. + + Say N if unsure. + +config DEV_DAX_PMEM_COMPAT + tristate "PMEM DAX: support the deprecated /sys/class/dax interface" + depends on DEV_DAX_PMEM + default DEV_DAX_PMEM + help + Older versions of the libdaxctl library expect to find all + device-dax instances under /sys/class/dax. If libdaxctl in + your distribution is older than v58 say M, otherwise say N. endif |