Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./LICENSES-AND-NOTICES/SPECS/data/licenses.json, ./LICENSES-AND-NOTICES/SPECS/LICENSES-MAP.md, ./LICENSES-AND-NOTICES/SPECS/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

Summary

This PR enables the Device Mapper cache target (dm-cache) as a loadable kernel module (CONFIG_DM_CACHE=m). The dm-cache module allows the use of fast storage devices (such as SSDs or NVMe drives) as caches for slower storage devices, improving overall I/O performance for systems with mixed storage types. It also enabled the CONFIG_DM_CACHE_SMQ cache policy.

Change Log

• Enable CONFIG_DM_CACHE=m and CONFIG_DM_CACHE_SMQ=m

Does this affect the toolchain?

YES

Associated issues

• https://dev.azure.com/microsoft/OS/_workitems/edit/58947094

Test Methodology

LISA test created

Full run