Document some of the kernel vm_page API as well as the pbuf API.

Submitted by: Chad David <davidc@acns.ab.ca>

1 files changed, 68 insertions, 0 deletions

diff --git a/share/man/man9/vm_page_sleep_busy.9 b/share/man/man9/vm_page_sleep_busy.9
new file mode 100644
index 0000000..760ce50
--- /dev/null
+++ b/share/man/man9/vm_page_sleep_busy.9
@@ -0,0 +1,68 @@
+.\"
+.\" 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd July 13, 2001
+.Dt VM_PAGE_SLEEP_BUSY 9
+.Os
+.Sh NAME
+.Nm vm_page_sleep_busy
+.Nd "wait for a busy page to become unbusy"
+.Sh SYNOPSIS
+.In sys/param.h
+.In vm/vm.h
+.In vm/vm_page.h
+.Ft int
+.Fn vm_page_sleep_busy "vm_page_t m" "int also_m_busy" "const char *wmesg"
+.Sh DESCRIPTION
+The
+.Fn vm_page_sleep_busy
+function waits until the
+.Dv PG_BUSY
+flag is cleared.
+If
+.Fa also_m_busy
+is non-zero, it also waits for
+.Fa m->busy
+to become zero.
+.Sh RETURN VALUES
+If
+.Fn vm_page_sleep_busy
+finds the page busy it returns
+.Dv TRUE .
+If not, it returns
+.Dv FALSE .
+Returning
+.Dv TRUE
+does not necessary mean that
+.Fn vm_page_sleep_busy
+slept, but only that
+.Fn splvm
+was called.
+.Sh AUTHORS
+This man page was written by
+.An Chad David Aq davidc@acns.ab.ca .