KFence Memory Safety Error Checking Is Looking Good For Minimal Overhead On Linux 5.12

Of the many new features coming with Linux 5.12 is KFence, short for the Kernel Electric Fence. KFence is a low-overhead memory safety error detector/validator for the kernel with lower expected overhead costs than say the Kernel Address Sanitizer. I just wrapped up some benchmarks looking out for any overhead impact of KFence on Linux 5.12 in its near-final state...