Function - Modify the target region's paging characteristics.
kern_return_t vm_wire (host_priv_t host, vm_task_t target_task, vm_address_t address, vm_size_t size, vm_prot_t wired_access);
The following value causes the region to be unwired (made pageable):
The vm_wire function sets the pageability privileges for a region within the specified task's address space. wired_access specifies the types of accesses to the memory region which must not suffer from (internal) faults of any kind after this call returns. A non-null wired_access value indicates that the page is to be "wired" into memory; a null value indicates "un-wiring". The kernel maintains for the region a count of the number of times the region is wired. A page is wired into physical memory if any task accessing it has a non-zero wired count for the page.
The region starts at the beginning of the virtual page containing address; it ends at the end of the virtual page containing address + size - 1. Because of this rounding to virtual page boundaries, the amount of memory affected may be greater than size. Use host_page_size to find the current virtual page size.
This interface is machine word length specific because of the virtual address parameter.