During November 2024, Abrehman contributed to the sched-ext/scx repository by enhancing CPU mask scalability and improving BPF CPU iteration ergonomics. He expanded the cpumask capacity from 4 to 128 bits using C, addressing mask overflow issues and enabling reliable scheduling on large-core systems. Abrehman also introduced standardized iterator macros, for_each_possible_cpu() and for_each_online_cpu(), within the BPF environment to streamline and simplify CPU mask iteration. These changes improved scheduler reliability and scalability, supporting deployment in environments with high CPU counts. His work demonstrated depth in kernel development and system programming, focusing on robust solutions for complex multi-CPU system challenges.