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+.\"
+.\" 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.
+.\"
+.Dd September 9, 2019
+.Dt VM_PAGE_WIRE 9
+.Os
+.Sh NAME
+.Nm vm_page_wire ,
+.Nm vm_page_unwire ,
+.Nm vm_page_unwire_noq
+.Nd "wire and unwire pages"
+.Sh SYNOPSIS
+.In sys/param.h
+.In vm/vm.h
+.In vm/vm_page.h
+.Ft void
+.Fn vm_page_wire "vm_page_t m"
+.Ft bool
+.Fn vm_page_wire_mapped "vm_page_t m"
+.Ft void
+.Fn vm_page_unwire "vm_page_t m" "int queue"
+.Ft bool
+.Fn vm_page_unwire_noq "vm_page_t m"
+.Sh DESCRIPTION
+The
+.Fn vm_page_wire
+and
+.Fn vm_page_wire_mapped
+functions wire the page, which prevents it from being reclaimed by the page
+daemon or when its containing object is destroyed.
+Both functions require that the page belong to an object.
+The
+.Fn vm_page_wire_mapped
+function is for use by the
+.Xr pmap 9
+layer following a lookup.
+This function may fail if mappings of the page are concurrently
+being destroyed, in which case it will return false.
+.Pp
+The
+.Fn vm_page_unwire
+and
+.Fn vm_page_unwire_noq
+functions release a wiring of a page.
+The
+.Fn vm_page_unwire
+function takes a queue index and will insert the page into the
+corresponding page queue upon releasing its last wiring.
+If the page does not belong to an object and no other references
+to the page exist,
+.Fn vm_page_unwire
+will free the page.
+.Fn vm_page_unwire_noq
+releases the wiring and returns true if it was the last wiring
+of the page.
+.Sh AUTHORS
+This manual page was written by
+.An Chad David Aq Mt davidc@acns.ab.ca .