GreenBoost is a kernel module plus an LD_PRELOAD CUDA shim that presents a tiered memory pool to CUDA clients: physical VRAM (T1), pinned system RAM mapped over PCIe (T2), and an optional NVMe-backed tier (T3). It is aimed at running larger models than the card's VRAM would normally allow, and ships a network feeder daemon, udev tuning and an optional eBPF tracer for the migration paths. Build the optional eBPF tracer for tier migration events (needs a kernel with CONFIG_DEBUG_INFO_BTF) IsolatedOctopi/greenboost