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CONFIG_FS_DAX: Direct Access (DAX) support

General informations

The Linux kernel configuration item CONFIG_FS_DAX:

Help text

Direct Access (DAX) can be used on memory-backed block devices. If the block device supports DAX and the filesystem supports DAX, then you can avoid using the pagecache to buffer I/Os. Turning on this option will compile in support for DAX; you will need to mount the filesystem using the -o dax option.

If you do not have a block device that is capable of using this, or if unsure, say N. Saying Y will increase the size of the kernel by about 5kB.



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