I once asked how Linux namespaces could be disabled with recompiling. One of the comments asked if I meant without building with CONFIG_USER_NS=n and the answer my question received said to set to user.max_*_namespaces to 0. I have recently discovered that there is also a CONFIG_NAMESPACES build parameter. Does this mean namespaces are still usable even if user.max_*_namespaces are all 0?