> the fundamental limit for atomic writes is usually the register-size for a CPU which is usually 64 or 32 bits CPUs nowadays support double the largest genera

> the fundamental limit for atomic writes is usually the register-size for a CPU which is usually 64 or 32 bits CPUs nowadays support double the largest general-purpose register width. Unofficially, some CPUs can also do twice that: https://rigtorp.se/isatomic/ https://rigtorp.se/isatomic/