CONFIG_DEV_DAX: Device DAX: direct access mapping device

General informations

The Linux kernel configuration item CONFIG_DEV_DAX has multiple definitions:

Device DAX: direct access mapping device found in drivers/dax/Kconfig

The configuration item CONFIG_DEV_DAX:

• prompt: Device DAX: direct access mapping device
• type: tristate
• depends on: CONFIG_TRANSPARENT_HUGEPAGE
• defined in drivers/dax/Kconfig
• found in Linux kernels: 4.12–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD
• modules built: dax, device_dax

Help text

Support raw access to differentiated (persistence, bandwidth, latency...) memory via an mmap(2) capable character device. Platform firmware or a device driver may identify a platform memory resource that is differentiated from the baseline memory pool. Mappings of a /dev/daxX.Y device impose restrictions that make the mapping behavior deterministic.

DAX: direct access to differentiated memory found in drivers/dax/Kconfig

The configuration item CONFIG_DEV_DAX:

• prompt: DAX: direct access to differentiated memory
• type: tristate
• depends on: ( CONFIG_NVDIMM_DAX ) && ( CONFIG_TRANSPARENT_HUGEPAGE )
• defined in drivers/dax/Kconfig
• found in Linux kernels: 4.7–4.11
• modules built: dax, device_dax

Help text

Support raw access to differentiated (persistence, bandwidth, latency...) memory via an mmap(2) capable character device. Platform firmware or a device driver may identify a platform memory resource that is differentiated from the baseline memory pool. Mappings of a /dev/daxX.Y device impose restrictions that make the mapping behavior deterministic.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb fs "dax" : CONFIG_DEV_DAX : drivers/dax/dax.c # in 4.9–4.11
• lkddb module dax CONFIG_DEV_DAX : drivers/dax/Kconfig : "DAX: direct access to differentiated memory" # in 4.7–4.11
• lkddb module device_dax CONFIG_DEV_DAX : drivers/dax/Kconfig : "Device DAX: direct access mapping device" # in 4.12–4.20, 5.0–5.19, 6.0–6.8, 6.9-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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