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CONFIG_DEV_DAX_KMEM: KMEM DAX: map dax-devices as System-RAM

General informations

The Linux kernel configuration item CONFIG_DEV_DAX_KMEM has multiple definitions:

KMEM DAX: map dax-devices as System-RAM found in drivers/dax/Kconfig

The configuration item CONFIG_DEV_DAX_KMEM:

Help text

Support access to persistent, or other performance differentiated memory as if it were System RAM. This allows easier use of persistent memory by unmodified applications, or adds core kernel memory services to heterogeneous memory types (HMEM) marked "reserved" by platform firmware.

To use this feature, a DAX device must be unbound from the device_dax driver and bound to this kmem driver on each boot.

Say N if unsure.

KMEM DAX: volatile-use of persistent memory found in drivers/dax/Kconfig

The configuration item CONFIG_DEV_DAX_KMEM:

Help text

Support access to persistent, or other performance differentiated memory as if it were System RAM. This allows easier use of persistent memory by unmodified applications, or adds core kernel memory services to heterogeneous memory types (HMEM) marked "reserved" by platform firmware.

To use this feature, a DAX device must be unbound from the device_dax driver and bound to this kmem driver on each boot.

Say N if unsure.

Hardware

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