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VM_FAULT_PREFAULT(9)	 BSD Kernel Developer's	Manual	  VM_FAULT_PREFAULT(9)

NAME
     vm_fault_prefault -- cluster page faults into a process's address space

SYNOPSIS
     #include <sys/param.h>
     #include <vm/vm.h>
     #include <vm/pmap.h>

     void
     vm_fault_prefault(pmap_t pmap, vm_offset_t	addra, vm_map_entry_t entry);

DESCRIPTION
     The vm_fault_prefault() function provides a means of clustering page-
     faults 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 ben-
     efits the execve(2) system	call by	eliminating repetitive calls to
     vm_fault(), which would otherwise be made to bring	the process's exe-
     cutable pages into	physical memory.

IMPLEMENTATION NOTES
     This is a machine-independent function which calls	the machine-dependent
     pmap_is_prefaultable(9) helper function to	determine if a page may	be
     prefaulted	into physical memory.

SEE ALSO
     execve(2),	pmap_is_prefaultable(9)

AUTHORS
     This manual page was written by Bruce M Simpson <bms@spc.org>.

BSD				 July 21, 2003				   BSD

NAME | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | SEE ALSO | AUTHORS

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