The
vm_fault_prefault()
function provides a means of clustering pagefaults into a process's
address space.
It operates upon the physical map
pmap.
The
entry
argument specifies the entry to be prefaulted; the
addra
argument specifies the beginning of the mapping in the process's virtual
address space.
It is typically called by
vm_fault()
after the first page fault.
It benefits the
execve(2)
system call by eliminating repetitive calls to
vm_fault(),
which would otherwise be made to bring the process's executable pages
into physical memory.
