From: Venkatesh Srinivas <me@endeavour.zapto.org>
Date: Wed, 8 Dec 2010 06:37:25 +0000 (-0800)
Subject: Import vm_map_findspace(9) manpage from FreeBSD and add flags/align arguments.
X-Git-Tag: v2.10.0~499
X-Git-Url: http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/a3034d50a62c9e75dd460d23e9d5f221c3358fc1

Import vm_map_findspace(9) manpage from FreeBSD and add flags/align arguments.
---

diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile
index 745892c..6ea0f83 100644
--- a/share/man/man9/Makefile
+++ b/share/man/man9/Makefile
@@ -173,6 +173,7 @@ MAN=	accept_filter.9 \
 	VFS_VPTOFH.9 \
 	vget.9 \
 	vhold.9 \
+	vm_map_findspace.9 \
 	vn_fullpath.9 \
 	vnode.9 \
 	VOP_ACCESS.9 \
diff --git a/share/man/man9/vm_map_findspace.9 b/share/man/man9/vm_map_findspace.9
new file mode 100644
index 0000000..be0e239
--- /dev/null
+++ b/share/man/man9/vm_map_findspace.9
@@ -0,0 +1,79 @@
+.\"
+.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.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
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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: src/share/man/man9/vm_map_findspace.9,v 1.5.22.1.4.1 2010/06/14 02:09:06 kensmith Exp $
+.\"
+.Dd December 8, 2010
+.Dt VM_MAP_FINDSPACE 9
+.Os
+.Sh NAME
+.Nm vm_map_findspace
+.Nd find a free region within a map
+.Sh SYNOPSIS
+.In sys/param.h
+.In vm/vm.h
+.In vm/vm_map.h
+.Ft int
+.Fo vm_map_findspace
+.Fa "vm_map_t map" "vm_offset_t start" "vm_size_t length" "vm_size_t align" "int flags" "vm_offset_t *addr"
+.Fc
+.Sh DESCRIPTION
+The
+.Fn vm_map_findspace
+function attempts to find a region with sufficient space in the
+.Fa map
+for an object of size
+.Fa length
+at the address
+.Fa addr 
+with the alignment
+.Fa align.
+The flags parameter can be:
+.Bl -tag -width ".Fa flags"
+.It Dv MAP_STACK
+The space returned is for stack regions and can intersect the stack address
+space.
+.El
+.Sh IMPLEMENTATION NOTES
+It is the caller's responsibility to obtain a lock on the
+.Fa map
+before calling this function.
+.Pp
+This routine may call
+.Xr pmap_growkernel 9
+to grow the kernel's address space, if and only if the mapping is being
+made within the kernel address space, and if insufficient space remains
+in the
+.Va kernel_map .
+.Sh RETURN VALUES
+The
+.Fn vm_map_findspace
+function returns the value 0 if successful, and
+.Fa *addr
+will contain the first virtual address in the found region;
+otherwise, the value 1 is returned.
+.Sh AUTHORS
+This manual page was written by
+.An Bruce M Simpson Aq bms@spc.org .