The driver we use at the moment with the 1080Ti is 440.94 and it works well
Care to give a link to that driver for Linux? I only found 440.82.
Also, what CUDA version, kernel version, CPu and number of GPUs are you using?
CPU utilization is not from the miniz executable itself, but from the drivers. If the executable doesn't efficient CUDA calls then the nvidia driver gets hogged and kworkers end up killing the CPU. This is amplified by the number of GPUs. If you only use a few GPUs then you'll never see a problem.
There is nothing wrong with my setup, proof being that Gminer has no issues whatsoever on the exact same algo. The issue is from miniz.