April 2026: Delivered two critical updates to sched-ext/scx that strengthen scheduling reliability and thermal awareness. LLC utilization drift was corrected by switching aggregation to per-task delta accounting and adding a runnable hook for PELT refresh, stabilizing utilization counters and improving visibility for scheduling decisions. Thermal pressure tracking was added in the scx_chaos module with dynamic adjustments based on thermal conditions, including kernel support checks for thermal events and autoload configuration for related programs. These changes reduce manual tuning, improve predictability of scheduling decisions, and enable energy-aware behavior under thermal stress. Technologies demonstrated include kernel scheduling, per-task accounting, PELT mechanics, thermal management, and autoload gate logic.

September 2025 performance summary for kernel development across sched-ext/scx, amazonlinux/linux, qualcomm-linux/kernel-topics, and linux-riscv/linux. Focused on enhancing scheduling safety, stability, and backward compatibility, delivering safer BPF scheduler APIs, robust null checks, and ordering fixes for CPU frequency initialization. The changes reduce crash risks, improve scheduling determinism on multi-core and NUMA systems, and provide a smoother upgrade path for older kernels.

2025-08 Monthly summary: Focused on reliability improvements in Linux CPU Power Management. Delivered a targeted fix to handle holes in CPU topology during late boot, ensuring the PM processing loop continues even when some CPUs are missing and that online CPUs are updated correctly. This reduces boot-time flakiness and improves CPU capacity adjustment robustness on systems with non-uniform CPU configurations. The patch was committed as 1ebe8f7e782523e62cd1fa8237f7afba5d1dae83 with message 'PM: EM: Fix late boot with holes in CPU topology'.

Concise monthly summary for 2025-07: Focused on correctness, documentation accuracy, and robustness of scheduling extensions. Delivered two key bug fixes across geerlingguy/linux and sched-ext/scx, with direct impact on developer clarity and production reliability. All changes are backed by clear commits and are ready for review in the next cycle.