DM Writecache Target Merged For Linux 4.18, Helping Databases & More
Written by Michael Larabel in Linux Kernel on 13 June 2018 at 05:49 AM EDT. 6 Comments
There is at least one interesting feature with the just-merged Device Mapper (DM) changes for the Linux 4.18 kernel.

The DM changes for Linux 4.18 introduce the new writecache target for dm-cache. This new target offers writeback caching to persistent memory or solid-state storage. Reads are not cached with this new target as those should be in the page cache in normal RAM.

The intention of the DM writecache target is for accelerating databases or other programs that rely upon low commit latency for operations.

Details on the new writecache target via this Git merge. Device Mapper updates for Linux 4.18 also include some minor adjustments and fixes.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 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 automated benchmarking software. He can be followed via Twitter or contacted via

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