microsoft/openvmm
Oct 2024 – Oct 2025
10 Months active
Languages Used
MarkdownRustCYAMLJavaScriptPowerShellProtobufShell
Technical Skills
DocumentationTechnical WritingCodebase ManagementDeveloper ExperienceEmbedded SystemsKernel Development
Matt Kurjanowicz
PROFILE
Matt Kurjanowicz
Matt Kurth contributed to the microsoft/openvmm repository by architecting and delivering features that advanced storage, virtualization, and developer experience. He implemented scalable NVMe device management using Rust, introducing a factory pattern and multithreaded driver architecture to improve concurrency and testability. Matt enhanced cross-compilation workflows, expanded Hyper-V and ARM64 support, and strengthened CI/CD reliability through targeted automation and documentation. His work included API integration, kernel-level driver development, and robust error handling, resulting in improved performance and stability. By focusing on maintainable code, clear onboarding guides, and comprehensive testing, Matt ensured the codebase remained adaptable and production-ready across evolving requirements.
Overall Statistics
Feature vs Bugs
68%Features
Repository Contributions
56Total
Bugs
12
Commits
56
Features
25
Lines of code
14,904
Activity Months10
Your Network
4203 people
Work History
October 2025
20 Commits • 5 Features
Oct 1, 2025October 2025 monthly summary for microsoft/openvmm focusing on delivering stability, broader Hyper-V support, and enhanced observability across storage, NVMe, and CI tooling. Key outcomes include OpenHCL storage integration with UI/CLI ergonomics, expanded StorVSP testing with Hyper-V coverage, advanced NVMe driver capabilities, CI/test stabilization, and improved diagnostics and API tooling that collectively boost reliability, performance visibility, and developer velocity.
20 Commits • 5 Features
Oct 1, 2025October 2025 monthly summary for microsoft/openvmm focusing on delivering stability, broader Hyper-V support, and enhanced observability across storage, NVMe, and CI tooling. Key outcomes include OpenHCL storage integration with UI/CLI ergonomics, expanded StorVSP testing with Hyper-V coverage, advanced NVMe driver capabilities, CI/test stabilization, and improved diagnostics and API tooling that collectively boost reliability, performance visibility, and developer velocity.
October 2025
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for microsoft/openvmm: Key feature delivered and business-aligned improvements in Release Management Documentation. The update clarifies release staging and terminology to match the Servicing workflow and introduces an explicit 'Out of service' phase. This improves deployment clarity, reduces risk, and enhances cross-team understanding of release paths.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for microsoft/openvmm: Key feature delivered and business-aligned improvements in Release Management Documentation. The update clarifies release staging and terminology to match the Servicing workflow and introduces an explicit 'Out of service' phase. This improves deployment clarity, reduces risk, and enhances cross-team understanding of release paths.
August 2025
2 Commits • 1 Features
Aug 1, 2025Monthly summary for 2025-08 (microsoft/openvmm): Implemented scalable NVMe device management architecture introducing a factory pattern for NVMe device creation within underhill_core, and refactored the NVMe manager to a two-level, multithreaded design (NvmeManager and NvmeDriverManager) to enable concurrent lifecycles across multiple devices. These changes address serialization bottlenecks, improve testability, and lay the groundwork for higher device throughput and reliability in production workloads.
2 Commits • 1 Features
Aug 1, 2025Monthly summary for 2025-08 (microsoft/openvmm): Implemented scalable NVMe device management architecture introducing a factory pattern for NVMe device creation within underhill_core, and refactored the NVMe manager to a two-level, multithreaded design (NvmeManager and NvmeDriverManager) to enable concurrent lifecycles across multiple devices. These changes address serialization bottlenecks, improve testability, and lay the groundwork for higher device throughput and reliability in production workloads.
August 2025
July 2025
9 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for microsoft/openvmm focused on delivering architecture-aware stability improvements, expanded testing coverage, and performance-oriented NVMe enhancements, while strengthening cross-build reliability and developer tooling.
July 2025
9 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for microsoft/openvmm focused on delivering architecture-aware stability improvements, expanded testing coverage, and performance-oriented NVMe enhancements, while strengthening cross-build reliability and developer tooling.
June 2025
7 Commits • 5 Features
Jun 1, 2025June 2025 monthly summary for microsoft/openvmm. This period focused on delivering documentation, cross-architecture testing enhancements, dev experience improvements, and automation capabilities, along with targeted bug fixes to stabilize CI pipelines. The work yielded business value by enabling cross-arch builds, improving onboarding, aligning test runs with real-world permissions, and expanding architecture support.
7 Commits • 5 Features
Jun 1, 2025June 2025 monthly summary for microsoft/openvmm. This period focused on delivering documentation, cross-architecture testing enhancements, dev experience improvements, and automation capabilities, along with targeted bug fixes to stabilize CI pipelines. The work yielded business value by enabling cross-arch builds, improving onboarding, aligning test runs with real-world permissions, and expanding architecture support.
June 2025
February 2025
2 Commits • 2 Features
Feb 1, 2025Month: 2025-02 — Delivered two high-impact features for microsoft/openvmm, enhancing stability, API compatibility, and release operations. Major bugs fixed: none reported this month. Impact and accomplishments: Upgraded core dependency zerocopy to 0.8.14 across the repository, refreshed build configuration and lockfile, and aligned code examples (e.g., FromZeroes) with the new API to maintain compatibility and leverage latest features. Added a comprehensive Release Management and Code Flow guide to clarify release branches, release phases, and backport approval processes, improving contributor onboarding and release predictability. These changes reduce maintenance overhead, enable faster, safer contributions, and strengthen the project’s long-term stability. Technologies/skills demonstrated: dependency management, build system updates, API compatibility, documentation quality and developer guides, and release workflow design.
February 2025
2 Commits • 2 Features
Feb 1, 2025Month: 2025-02 — Delivered two high-impact features for microsoft/openvmm, enhancing stability, API compatibility, and release operations. Major bugs fixed: none reported this month. Impact and accomplishments: Upgraded core dependency zerocopy to 0.8.14 across the repository, refreshed build configuration and lockfile, and aligned code examples (e.g., FromZeroes) with the new API to maintain compatibility and leverage latest features. Added a comprehensive Release Management and Code Flow guide to clarify release branches, release phases, and backport approval processes, improving contributor onboarding and release predictability. These changes reduce maintenance overhead, enable faster, safer contributions, and strengthen the project’s long-term stability. Technologies/skills demonstrated: dependency management, build system updates, API compatibility, documentation quality and developer guides, and release workflow design.
January 2025
7 Commits • 1 Features
Jan 1, 2025January 2025 performance summary for microsoft/openvmm highlights the acceleration of resilience and test coverage through StorVSP fuzzing, CI reliability improvements, and targeted bug fixes across the IO and DMA paths. The team delivered a new StorVSP fuzzer with initial core packet processing coverage and groundwork for asynchronous fuzzing, followed by a refactor to improve resilience against invalid packets. Strengthened CI stability by updating AzCopy tooling and download URL. Fixed critical IO and guest-data handling bugs: NvmeDriver input sanitization and robust error handling for fuzzer; vmbus_async improved handling to avoid panics on empty external data; Reverted an unstable openhcl aarch64 DMA visibility pool change to preserve stability. These changes were implemented via key commits including: RFC: storvsp: new fuzzer (#612) (1bd36785c1521ecd7bf2cc72d6bde8054ba1e93f), fuzz_storvsp: forward progress with invalid packets (#648) (3b884e8286cdc47ce12a223a4c741b8823864645), ci: workaround for azcopy path change (#663) (8c52f138095a44e80086cf421485c46dc94b7262), ci: minor update to azcopy version (#667) (4320f72acdf1485eb661587e9ccbe2d9510f33ee), fuzz_nvme_driver: fix fuzzer-found bugs (#585) (8171cea0db927a008d852fe0f3aa3b443021693a), vmbus_async: don't panic on empty external data (#621) (e5c5db184b3826b42f48dd96a9f3b18e4f4289c7), openhcl: revert #539 (use shared visibility pool for aarch64 dma) (#729) (cdf1bc22b99cd2d8eeb6c0e0c99405118ee08949)
7 Commits • 1 Features
Jan 1, 2025January 2025 performance summary for microsoft/openvmm highlights the acceleration of resilience and test coverage through StorVSP fuzzing, CI reliability improvements, and targeted bug fixes across the IO and DMA paths. The team delivered a new StorVSP fuzzer with initial core packet processing coverage and groundwork for asynchronous fuzzing, followed by a refactor to improve resilience against invalid packets. Strengthened CI stability by updating AzCopy tooling and download URL. Fixed critical IO and guest-data handling bugs: NvmeDriver input sanitization and robust error handling for fuzzer; vmbus_async improved handling to avoid panics on empty external data; Reverted an unstable openhcl aarch64 DMA visibility pool change to preserve stability. These changes were implemented via key commits including: RFC: storvsp: new fuzzer (#612) (1bd36785c1521ecd7bf2cc72d6bde8054ba1e93f), fuzz_storvsp: forward progress with invalid packets (#648) (3b884e8286cdc47ce12a223a4c741b8823864645), ci: workaround for azcopy path change (#663) (8c52f138095a44e80086cf421485c46dc94b7262), ci: minor update to azcopy version (#667) (4320f72acdf1485eb661587e9ccbe2d9510f33ee), fuzz_nvme_driver: fix fuzzer-found bugs (#585) (8171cea0db927a008d852fe0f3aa3b443021693a), vmbus_async: don't panic on empty external data (#621) (e5c5db184b3826b42f48dd96a9f3b18e4f4289c7), openhcl: revert #539 (use shared visibility pool for aarch64 dma) (#729) (cdf1bc22b99cd2d8eeb6c0e0c99405118ee08949)
January 2025
December 2024
3 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for microsoft/openvmm. Focused on tightening ownership, stabilizing DMA behavior on aarch64/OpenHCL, and improving code quality across VMM components. Key outcomes include more precise PR routing, reduced IO-related failures on NVMe with aarch64, and maintainable codebase through automated formatting. These efforts contributed to faster delivery cycles and more reliable platform behavior in storage and virtualization components.
December 2024
3 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for microsoft/openvmm. Focused on tightening ownership, stabilizing DMA behavior on aarch64/OpenHCL, and improving code quality across VMM components. Key outcomes include more precise PR routing, reduced IO-related failures on NVMe with aarch64, and maintainable codebase through automated formatting. These efforts contributed to faster delivery cycles and more reliable platform behavior in storage and virtualization components.
November 2024
4 Commits • 3 Features
Nov 1, 20242024-11 monthly summary for microsoft/openvmm: Focused on developer onboarding improvements, ARM64 IO path reliability, and project branding. Delivered three features, fixed documentation rendering issues, and strengthened cross-platform build guidance, resulting in faster onboarding, more robust operations, and a cleaner, more maintainable codebase.
4 Commits • 3 Features
Nov 1, 20242024-11 monthly summary for microsoft/openvmm: Focused on developer onboarding improvements, ARM64 IO path reliability, and project branding. Delivered three features, fixed documentation rendering issues, and strengthened cross-platform build guidance, resulting in faster onboarding, more robust operations, and a cleaner, more maintainable codebase.
November 2024
October 2024
1 Commits • 1 Features
Oct 1, 2024October 2024 — OpenVMM (microsoft/openvmm) monthly summary focused on onboarding and documentation improvements. Delivered updates to the OpenVMM Developer Guide Getting Started Experience, including fixes for a broken link, relocation of Linux build dependencies to the setup page, and the addition of a plugin-based tip to streamline initial contributor setup. These changes reduce onboarding friction, clarify setup requirements, and accelerate first-PR readiness. A single, traceable commit accompanied the feature work.
October 2024
1 Commits • 1 Features
Oct 1, 2024October 2024 — OpenVMM (microsoft/openvmm) monthly summary focused on onboarding and documentation improvements. Delivered updates to the OpenVMM Developer Guide Getting Started Experience, including fixes for a broken link, relocation of Linux build dependencies to the setup page, and the addition of a plugin-based tip to streamline initial contributor setup. These changes reduce onboarding friction, clarify setup requirements, and accelerate first-PR readiness. A single, traceable commit accompanied the feature work.
Activity
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Quality Metrics
Correctness89.6%
Maintainability88.0%
Architecture85.2%
Performance81.2%
AI Usage23.2%
Skills & Technologies
Programming Languages
CC++CSSHTMLJSONJavaScriptMarkdownPowerShellProtobufPython
Technical Skills
API IntegrationAPI UpdatesAbstractionActor ModelAsynchronous ProgrammingBuild SystemsBuild ToolsCI/CDCargoCode FormattingCode OwnershipCode RefactoringCodebase ManagementCommand Line InterfaceCommand Line Tools
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