1config DM_PCACHE 2 tristate "Persistent cache for Block Device (Experimental)" 3 depends on BLK_DEV_DM 4 depends on DEV_DAX 5 help 6 PCACHE provides a mechanism to use persistent memory (e.g., CXL persistent memory, 7 DAX-enabled devices) as a high-performance cache layer in front of 8 traditional block devices such as SSDs or HDDs. 9 10 PCACHE is implemented as a kernel module that integrates with the block 11 layer and supports direct access (DAX) to persistent memory for low-latency, 12 byte-addressable caching. 13 14 Note: This feature is experimental and should be tested thoroughly 15 before use in production environments. 16 17 If unsure, say 'N'. 18