Kernel developers are integrating BPF (Berkeley Packet Filter) into the blk-iocost subsystem. This change addresses the evolving needs of I/O scheduling, shifting focus from optimizing for rotating drives to enforcing fairness between users with fast, solid-state drives.
Historically, I/O scheduling prioritized request ordering to maximize the performance of mechanical hard drives. However, with the rise of SSDs capable of millions of I/O operations, the emphasis has changed. The new implementation aims to ensure fair access to I/O resources while maintaining the speed necessary to keep pace with modern storage technology.
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