microsoft/openvmm
Apr 2025 – Sep 2025
2 Months active
Languages Used
Rust
Technical Skills
Kernel DevelopmentSystem ProgrammingVirtualizationPerformance OptimizationStorage Systems
Feng Liang
PROFILE
Feng Liang
Fang Liang contributed to microsoft/openvmm by developing targeted kernel and storage optimizations using Rust and system programming skills. He improved IO provisioning reliability for hardware-isolated confidential VMs under TDX Windows by conditionally increasing the swiotlb buffer size, addressing DVD provisioning failures without impacting other VM types. Later, he enhanced storage performance by implementing a dynamic poll_mode_queue_depth adjustment for remote SCSI disks, applying the change only to specific controller instances to avoid regressions on local disks. His work demonstrated careful risk management and validation, focusing on precise, production-safe improvements in virtualization, kernel development, and storage systems within a short timeframe.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
2Total
Bugs
1
Commits
2
Features
1
Lines of code
82
Activity Months2
Your Network
4476 peopleSame Organization
@microsoft.com4432
GitOpsMember
Ananta GuptaMember
Abigail HartmanMember
Abram SandersonMember
Adam EttenbergerMember
Ami HollanderMember
AndersMember
Andrej KyselicaMember
Andrew MalkovMember
Work History
September 2025
1 Commits • 1 Features
Sep 1, 2025Monthly performance summary for 2025-09 focused on storage performance optimization for microsoft/openvmm. Delivered a targeted remote SCSI poll_mode_queue_depth optimization to boost IOPS for remote disks with a specific SCSI controller, while preserving local-disk behavior and avoiding unintended side effects.
1 Commits • 1 Features
Sep 1, 2025Monthly performance summary for 2025-09 focused on storage performance optimization for microsoft/openvmm. Delivered a targeted remote SCSI poll_mode_queue_depth optimization to boost IOPS for remote disks with a specific SCSI controller, while preserving local-disk behavior and avoiding unintended side effects.
September 2025
April 2025
1 Commits
Apr 1, 2025April 2025 – Microsoft/OpenVMM: Key stability improvement for IO provisioning in hardware-isolated CVMs under TDX Windows VMs. Implemented a targeted swiotlb buffer size adjustment to 8MB to fix DVD provisioning IO failures, applied conditionally by VM isolation type, improving reliability and reducing provisioning failures in production. Commit: 8903632c5f10ee44689d9822b15020c554ad588a (“openhcl_boot: update swiotlb to 8MB on hardware isolated CVMs (#1116)”).
April 2025
1 Commits
Apr 1, 2025April 2025 – Microsoft/OpenVMM: Key stability improvement for IO provisioning in hardware-isolated CVMs under TDX Windows VMs. Implemented a targeted swiotlb buffer size adjustment to 8MB to fix DVD provisioning IO failures, applied conditionally by VM isolation type, improving reliability and reducing provisioning failures in production. Commit: 8903632c5f10ee44689d9822b15020c554ad588a (“openhcl_boot: update swiotlb to 8MB on hardware isolated CVMs (#1116)”).
Activity
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Quality Metrics
Correctness80.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Rust
Technical Skills
Kernel DevelopmentPerformance OptimizationStorage SystemsSystem ProgrammingVirtualization
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