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Recent Fedora Enterprise Linux Next (ELN) meeting notes suggest that Microsoft is exploring the possibility of rebasing Azure Linux on Fedora’s package ecosystem. During the April 21 ELN SIG meeting, contributors discussed enabling Fedora package builds optimized for the x86_64-v3 microarchitecture.
Neal Gompa Noted Microsoft’s interest in the effort, along with the possibility of contributing compute resources. A key point from the discussion was:
“Azure wants to rebase Azure Linux more or less on Fedora and they need x86_64-v3 for performance.”
To clarify, Azure Linux—previously known as CBL-Mariner—is Microsoft’s in-house Linux distribution designed for cloud infrastructure and Azure workloads. Although it already uses RPM packaging and SPEC files, it is not currently based on Fedora. Instead, it is independently maintained to meet Microsoft’s internal and cloud platform needs.
A shift toward Fedora would allow Microsoft to keep its RPM-based workflow while aligning more closely with Fedora’s upstream ecosystem, rather than maintaining a separate RPM base.
Performance appears to be the main driver behind this discussion. Fedora is evaluating x86_64-v3 builds, which target newer processors with improved instruction sets. This approach could deliver better performance on modern hardware while preserving compatibility with older systems.
For Microsoft, operating at massive cloud scale, even small efficiency gains can translate into significant overall improvements. Aligning Azure Linux with Fedora’s package base and optimized builds could reduce duplication of effort and provide a stronger upstream foundation.
That said, this is not a finalized move. Microsoft has not officially announced any transition to Fedora, and the meeting notes do not outline a concrete roadmap or timeline. At this stage, it reflects ongoing technical discussions rather than a confirmed decision.
