Reference
The kernel ublk UAPI, test results for both libraries, and comparative RAM benchmarks.
The UAPI reference and compatibility matrix render data from site/data/. The benchmarks report measured RAM workloads and link to hosted evidence. The guide chapters explain how the kernel pieces fit together.
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UAPI reference
Every ublk control command, I/O command, feature flag, parameter type, I/O operation and flag, device state, structure and constant, with the Linux release that introduced it and its go-ublk status.
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Compatibility matrix
lib-ublk's RAM device qualification and go-ublk's per-kernel conformance results, with their separate test scopes.
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Comparative benchmarks
The ublk overhead ladder: kernel floors, userspace transport, and RAM targets, with latency and CPU costs.