This is xnu-11215.1.10. See this file in:
#!/usr/sbin/dtrace -s
vminfo:::vm_map_delete_permanent_prot_none
{
printf("%d[%s]: keeping \"deleted\" permanent mapping [ 0x%llx - 0x%llx ] prot 0x%x/0x%x -> 0/0",
pid,
execname,
(uint64_t) arg1,
(uint64_t) arg2,
arg3,
arg4);
stack();
ustack();
}