pub const vm_region_extended_info = extern struct {
    protection: vm_prot_t,
    user_tag: u32,
    pages_resident: u32,
    pages_shared_now_private: u32,
    pages_swapped_out: u32,
    pages_dirtied: u32,
    ref_count: u32,
    shadow_depth: u16,
    external_pager: u8,
    share_mode: u8,
    pages_reusable: u32,
}