CONFIG_DM_PCACHE: Persistent cache for Block Device (Experimental)

General informations

The Linux kernel configuration item CONFIG_DM_PCACHE:

• prompt: Persistent cache for Block Device (Experimental)
• type: tristate
• depends on: ( CONFIG_BLK_DEV_DM ) && ( CONFIG_DEV_DAX )
• defined in drivers/md/dm-pcache/Kconfig
• found in Linux kernels: 6.18-rc+HEAD

Help text

PCACHE provides a mechanism to use persistent memory (e.g., CXL persistent memory, DAX-enabled devices) as a high-performance cache layer in front of traditional block devices such as SSDs or HDDs.

PCACHE is implemented as a kernel module that integrates with the block layer and supports direct access (DAX) to persistent memory for low-latency, byte-addressable caching.

Note: This feature is experimental and should be tested thoroughly before use in production environments.

If unsure, say 'N'.

Hardware

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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