http://cypherpunk-handbook.i2p/articles/openbsd.html
Administrators can
re-enable SMT through hw.smt when their performance needs
and threat model justify sharing a physical core. Fedora Secureblue sets mitigations=auto,nosmt , which
disables SMT by default on processors affected by relevant
vulnerabilities. OpenBSD disables SMT by default without making that
decision conditional on the detected processor. 18 - Memory allocation randomization Windows, Linux, macOS, and Android all provide system...