facebook/folly
Nov 2025 – Nov 2025
1 Month active
Languages Used
C++
Technical Skills
Linux kernel developmentmemory managementsystem programming
Devesh Agrawal
PROFILE
Devesh Agrawal
During November 2025, Deepak Agrawal developed an efficient memory locking optimization for the facebook/folly repository, focusing on Linux kernel development and memory management using C++. He implemented a feature that collapses 4KB memory pages into 2MB Transparent Huge Pages (THP) before locking, leveraging madvise with MADV_POPULATE_READ and MADV_COLLAPSE on Linux kernel 6.1 and above. This approach was integrated into the existing chunked locking path in folly’s MemoryMapping, reducing memory locking overhead and improving throughput for high-concurrency workloads. Deepak’s work demonstrated a strong grasp of system programming and careful integration with modern Linux memory management APIs.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
1Total
Bugs
0
Commits
1
Features
1
Lines of code
36
Activity Months1
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Work History
November 2025
1 Commits • 1 Features
Nov 1, 2025Month 2025-11: Key feature delivered: Efficient Memory Locking with THP Collapsing in folly, collapsing 4KB pages to a 2MB Transparent Huge Page (THP) before locking to optimize memory management and performance. Implemented via madvise with MADV_POPULATE_READ and MADV_COLLAPSE on Linux kernel 6.1+ and integrated with the existing chunked locking path in MemoryMapping. The change was landed with commit bec39c9eb3e9760f486e90e6a572a4047eb44218, reviewed by luciang, and tied to Differential Revision: D86993970. Major bugs fixed: none reported this month. This optimization reduces memory locking overhead and improves throughput under memory-intensive, high-concurrency workloads, demonstrating strong command of Linux memory management, performance tuning, and patch lifecycle.
1 Commits • 1 Features
Nov 1, 2025Month 2025-11: Key feature delivered: Efficient Memory Locking with THP Collapsing in folly, collapsing 4KB pages to a 2MB Transparent Huge Page (THP) before locking to optimize memory management and performance. Implemented via madvise with MADV_POPULATE_READ and MADV_COLLAPSE on Linux kernel 6.1+ and integrated with the existing chunked locking path in MemoryMapping. The change was landed with commit bec39c9eb3e9760f486e90e6a572a4047eb44218, reviewed by luciang, and tied to Differential Revision: D86993970. Major bugs fixed: none reported this month. This optimization reduces memory locking overhead and improves throughput under memory-intensive, high-concurrency workloads, demonstrating strong command of Linux memory management, performance tuning, and patch lifecycle.
November 2025
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++
Technical Skills
Linux kernel developmentmemory managementsystem programming
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