> 1) How does this work differ from Mark Silberstein's GPUfs from 2014 [1]?

Just quoting the paper:

>Using GPUfs, Silberstein et al . [ 24] demonstrate that offering a library interface to CPU FS eases access to storage for GPU programmers, but GPUfs only calls a CPU-side file system. GPU4FS offers a similar interface to GPUfs, but runs the file system on the GPU.