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pmap_zero_page(9) [freebsd man page]

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

NAME
pmap_zero_page, pmap_zero_area, pmap_zero_idle -- zero-fill a page using machine-dependent optimizations SYNOPSIS
#include <sys/param.h> #include <vm/vm.h> #include <vm/pmap.h> void pmap_zero_page(vm_page_t m); void pmap_zero_page_area(vm_page_t m, int off, int size); void pmap_zero_page_idle(vm_page_t m); DESCRIPTION
The pmap_zero_page() function zero-fills an entire page using machine-dependent optimizations. The pmap_zero_page_area() function is used to zero-fill an area of a page. The range specified must not cross a page boundary; it must be contained entirely within a single page. The pmap_zero_page_idle() interface is used by the vm_pagezero process. The system-wide Giant lock should not be required to be held in order to call this interface. IMPLEMENTATION NOTES
This function is required to be implemented for each architecture supported by FreeBSD. SEE ALSO
bzero(3), pmap(9) AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>. BSD
July 21, 2003 BSD

Check Out this Related Man Page

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 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. 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

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