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CONFIG_BLK_DEV_PMEM: PMEM: Persistent memory block device support

General informations

The Linux kernel configuration item CONFIG_BLK_DEV_PMEM has multiple definitions:

PMEM: Persistent memory block device support found in drivers/nvdimm/Kconfig

The configuration item CONFIG_BLK_DEV_PMEM:

Help text

Memory ranges for PMEM are described by either an NFIT (NVDIMM Firmware Interface Table, see ACPI_NFIT), a non-standard OEM-specific E820 memory type (type-12, see X86_PMEM_LEGACY), or it is manually specified by the 'memmap=nn[KMG]!ss[KMG]' kernel command line (see Documentation/admin-guide/kernel-parameters.rst). This driver converts these persistent memory ranges into block devices that are capable of DAX (direct-access) file system mappings. See Documentation/driver-api/nvdimm/nvdimm.rst for more details.

Say Y if you want to use an NVDIMM

Persistent memory block device support found in drivers/block/Kconfig

The configuration item CONFIG_BLK_DEV_PMEM:

Help text

Saying Y here will allow you to use a contiguous range of reserved memory as one or more persistent block devices.

To compile this driver as a module, choose M here: the module will be called 'pmem'.

If unsure, say N.

Hardware

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