Should we include support for GPUDirect/RDMA as in NVIDIA's gdrcopy?

[eyalroz]

NVIDIA/gdrcopy:

A low-latency GPU memory copy library based on NVIDIA GPUDirect RDMA technology.
Introduction

While GPUDirect RDMA is meant for direct access to GPU memory from third-party devices, it is possible to use these same APIs to create perfectly valid CPU mappings of the GPU memory.

The advantage of a CPU driven copy is the very small overhead involved. That might be useful when low latencies are required.