OpenBSD: PF queues break the 4 Gbps barrier
OpenBSD's PF HFSC traffic shaping bandwidth fields were widened from 32-bit to 64-bit integers to remove the bottleneck. The previous 32-bit limit silently capped bandwidth at about 4.29 Gbps, causing wraparound and unpredictable scheduling on high-speed interfaces. With 10G, 25G, and 100G interfaces becoming common, the limitation hindered correct configuration and scheduling in practice. The patch also fixes a pftop display bug for bandwidth above 4 Gbps and enables values up to 999G. Le fil de discussion précise que le patch est prêt à être soumis et que le code pourrait être commité d’ici le 20 mars 2026, avec appel à tester les instantanés -current et à soutenir la Fondation OpenBSD.