I write kernel mode drivers as my day job, and this is certainly the first time I've ever heard of non-swappable being called "wired". For what OS? Consider ht

I write kernel mode drivers as my day job, and this is certainly the first time I've ever heard of non-swappable being called "wired". For what OS? Consider https://wiki.freebsd.org/Memory https://wiki.freebsd.org/Memory Wired - Non-pageable memory: cannot be freed until explicitly released by the owner - Userland memory can be wired by mlock(2) (subject to system and per-user limits) - Kernel memory allocators return wired memory - Contents of the ARC and the buffer cache are wired - Some memory is permanently wired and is never freed (e.g., the kernel file itself) OSX is derived from BSD.