Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. 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(s), this list of conditions and the following disclaimer as
the first lines of this file unmodified other than the possible
addition of one or more copyright notices.
2. Redistributions in binary form must reproduce the above copyright
notice(s), this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.

$FreeBSD: head/share/man/man9/vm_page_insert.9 80679 2001-07-30 22:14:23Z alfred $

.Dd July 17, 2001 .Dt VM_PAGE_INSERT 9 .Os .Sh NAME .Nm vm_page_insert , .Nm vm_page_remove .Nd "add and remove pages from an object" .Sh SYNOPSIS n sys/param.h n vm/vm.h n vm/vm_page.h .Ft void .Fn vm_page_insert "vm_page_t m" "vm_object_t object" "vm_pindex_t pindex" .Ft void .Fn vm_page_remove "vm_page_t m" .Sh DESCRIPTION The .Fn 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 kernels pmap.

p If .Dv PG_WRITEABLE is set in the page's flags .Dv OBJ_WRITEABLE and .Dv OBJ_MIGHTBEDIRTY are set in the object's flags.

p The .Fn vm_page_remove function removes the given page from it's 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.

p The arguments to .Fn vm_page_insert are: l -tag -width ".Fa object t m The page to add to the object. t object The object the page should be added to. t pindex The index into the object the page should be at. .El

p The arguments to .Fn vm_page_remove are: l -tag -width ".Fa m" t m The page to remove. .El .Sh 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. .Sh AUTHORS This manual page was written by .An Chad David Aq davidc@acns.ab.ca .