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CONFIG_DEV_DAX_HMEM: HMEM DAX: direct access to 'specific purpose' memory

General informations

The Linux kernel configuration item CONFIG_DEV_DAX_HMEM:

Help text

EFI 2.8 platforms, and others, may advertise 'specific purpose' memory. For example, a high bandwidth memory pool. The indication from platform firmware is meant to reserve the memory from typical usage by default. This driver creates device-dax instances for these memory ranges, and that also enables the possibility to assign them to the DEV_DAX_KMEM driver to override the reservation and add them to kernel "System RAM" pool.

Say M if unsure.



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