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CONFIG_DEV_DAX_KMEM: KMEM DAX: volatile-use of persistent memory

General informations

The Linux kernel configuration item CONFIG_DEV_DAX_KMEM:

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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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