Copyright (c) 2003 Bruce M Simpson <firstname.lastname@example.org> All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documenta...
NAMEvm_fault_prefault - cluster page faults into a process's address space
SYNOPSISIn sys/param.h In vm/vm.h In vm/pmap.h Ft void Fn vm_fault_prefault pmap_t pmap vm_offset_t addra vm_map_entry_t entry
DESCRIPTIONThe Fn vm_fault_prefault function provides a means of clustering pagefaults into a process's address space. It operates upon the physical map Fa pmap . The Fa entry argument specifies the entry to be prefaulted; the Fa addra argument specifies the beginning of the mapping in the process's virtual address space.
It is typically called by Fn vm_fault after the first page fault. It benefits the execve(2) system call by eliminating repetitive calls to Fn vm_fault , which would otherwise be made to bring the process's executable pages into physical memory.