There are good reasons, not all of which I know or understand, but my basic mental model is that the backing is required for various scenarios where virtual mem

There are good reasons, not all of which I know or understand, but my basic mental model is that the backing is required for various scenarios where virtual memory might need to get relocated, either in response to a malloc or to something else. I’m told it’s complicated by having the GPU drive the display, and by scenarios involving multiple GPUs in a system. I’m guessing the description in the WDDM docs about DDI might be relevant to what’s happening under the covers in WDDM2? I’m not sure… :) https://docs.microsoft.com/en-us/windows-hardware/drivers/display/gpu-virtual-memory-in-wddm-2-0 https://docs.microsoft.com/en-us/windows-hardware/drivers/di...