@mcc If you asked this before the existence of non-4KB virtual memory architectures, I'd say yes. I'm not sure how Linux or the BSDs ended up reconciling architectures where there may be a different granularity of memory protection vs address mapping. I'm not sure if POSIX covers this, or would have thought to cover this specific case, either. (I do know that other OS allow for different granules, and it is *annoying*)