CONFIG_BLK_DEV_DAX: Block device DAX support

General informations

The Linux kernel configuration item CONFIG_BLK_DEV_DAX:

• prompt: Block device DAX support
• type: bool
• depends on: ( CONFIG_FS_DAX ) && ( CONFIG_BROKEN )
• defined in block/Kconfig
• found in Linux kernels: 4.5–4.7

Help text

When DAX support is available (FS_DAX) raw block devices can also support direct userspace access to the storage capacity via MMAP(2) similar to a file on a DAX-enabled filesystem. However, the DAX I/O-path disables some standard I/O-statistics, and the MMAP(2) path has some operational differences due to bypassing the page cache. If in doubt, say N.

Hardware

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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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