VM_PAGE_INSERT(9) BSD Kernel Developer's Manual VM_PAGE_INSERT(9)NAME
vm_page_insert, vm_page_remove — add/remove page from an object
SYNOPSIS
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
void
vm_page_insert(vm_page_t m, vm_object_t object, vm_pindex_t pindex);
void
vm_page_remove(vm_page_t m);
DESCRIPTION
The vm_page_insert() function adds a page to the given object at the
given index. The page is added to both the VM page hash table and to the
object's list of pages, but the hardware page tables are not updated. In
the case of a user page, it will be faulted in when it is accessed. If
the page is a kernel page, the caller is expected to handle adding the
page to the kernel's pmap.
If PG_WRITEABLE is set in the page's flags, OBJ_WRITEABLE and
OBJ_MIGHTBEDIRTY are set in the object's flags.
The vm_page_remove() function removes the given page from its object, and
from the VM page hash table. The page must be busy prior to this call,
or the system will panic. The pmap entry for the page is not removed by
this function.
The arguments to vm_page_insert() are:
m The page to add to the object.
object The object the page should be added to.
pindex The index into the object the page should be at.
The arguments to vm_page_remove() are:
m The page to remove.
IMPLEMENTATION NOTES
The index of a page in a VM object is the byte index into the same object
truncated to a page boundary. For example, if the page size is 4096
bytes, and the address in the object is 81944, the page index is 20.
AUTHORS
This manual page was written by Chad David ⟨davidc@acns.ab.ca⟩.
BSD July 17, 2001 BSD
