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…

Source: Phoronix – KFence Memory Safety Error Checking Is Looking Good For Minimal Overhead On Linux 5.12