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⇱ DM-PCACHE Merged For Linux 6.18 Along With Other DeviceMapper Changes - Phoronix

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DM-PCACHE Merged For Linux 6.18 Along With Other DeviceMapper Changes

Written by Michael Larabel in Linux Storage on 4 October 2025 at 05:10 AM EDT. 6 Comments
The DeviceMapper changes have been merged for the Linux 6.18 kernel that includes the new DM-PCACHE target.

DM-PCACHE is a high throughput, low-latency DAX read/write cache. This persistent memory cache can be used in front of slower block devices and according to its developer faster than the likes of BCache and DM-Writecache:

👁 DM-PCACHE comparison


The DeviceMapper code for Linux 6.18 also includes a REQ_PREFLUSH optimization for the dm-linear target, the dm-integrity target supporting the async hash interface for better performance, and various other changes.

More details on the now-merged DM changes for Linux 6.18 via this pull request.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.