RADV is a driver for AMD cards. The linked blog post https://pixelcluster.github.io/VRAM-Mgmt-fixed/ title is “Fixing AMDGPU’s VRAM management for low-end GPUs” and the word nvidia does not appear once in it. Unless I am misunderstanding this, it looks like AMD only. If anyone has direct confirmation that this works on Nvidia too (proprietary or open source drivers), I will update my previous replies to reflect that.