Use your NVIDIA GPU's VRAM as swap space on Linux.

Built for laptops with soldered memory and no upgrade path. If you have an RTX card sitting there with 8GB of VRAM and you're getting swapped to SSD, this puts that VRAM to work.

Tested on: RTX 3070 Laptop (GA104M, 16 GB physical, 8 GB VRAM), driver 580.159.03, kernel 6.17, Pop!_OS. Allocated 7 GB for swap. End result including zram and SSD swap ~46 GB, tripled the addressable memory. Overflow order is: RAM fills, then VRAM absorbs spill (fast, PCIe), then zram compresses the rest (CPU), then SSD only if everything else is exhausted.

How it works

A small daemon allocates VRAM via the CUDA driver API, then serves it as a block device using the NBD (Network Block Device) protocol over a Unix socket. The kernel's built-in nbd driver connects to it and exposes /dev/nbdX .…