CONFIG_RAMDAX: Support persistent memory interfaces on RAM carveouts

General informations

The Linux kernel configuration item CONFIG_RAMDAX:

• prompt: Support persistent memory interfaces on RAM carveouts
• type: tristate
• depends on: CONFIG_X86_PMEM_LEGACY || CONFIG_OF || CONFIG_COMPILE_TEST
• defined in drivers/nvdimm/Kconfig
• found in Linux kernels: 6.19-rc+HEAD
• modules built: ramdax

Help text

Allows creation of DAX devices on RAM carveouts.

Memory ranges that are manually specified by the 'memmap=nn[KMG]!ss[KMG]' kernel command line or defined by dummy pmem-region device tree nodes would be managed by this driver as DIMM devices with support for dynamic layout of namespaces. The driver steals 128K in the end of the memmap range for the namespace management. This allows supporting up to 509 namespaces (see 'ndctl create-namespace --help'). The driver should be force bound to e820_pmem or pmem-region platform devices using 'driver_override' device attribute.

Select N if unsure.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module ramdax CONFIG_RAMDAX : drivers/nvdimm/Kconfig : "Support persistent memory interfaces on RAM carveouts" # in 6.19-rc+HEAD
• lkddb of "" "" "pmem-region" : CONFIG_LIBNVDIMM CONFIG_RAMDAX : drivers/nvdimm/ramdax.c # in 6.19-rc+HEAD
• lkddb platform "ramdax" : CONFIG_LIBNVDIMM CONFIG_RAMDAX : drivers/nvdimm/ramdax.c # in 6.19-rc+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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