From a3dd350377c5d2f426c62ff95a9b804f39c415aa Mon Sep 17 00:00:00 2001
From: Martin Pieuchot <mpi@cvs.openbsd.org>
Date: Thu, 23 Apr 2020 07:57:28 +0000
Subject: Document uvmexp.nswget without relying on implementation details.

Prompted by a question from schwarze@

ok deraadt@, schwarze@, visa@
---
 share/man/man9/uvm_init.9 | 6 +++---
 sys/uvm/uvmexp.h          | 4 ++--
 usr.bin/systat/systat.1   | 7 +++----
 3 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/share/man/man9/uvm_init.9 b/share/man/man9/uvm_init.9
index a40b6bc7e24..7aa15559a8b 100644
--- a/share/man/man9/uvm_init.9
+++ b/share/man/man9/uvm_init.9
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: uvm_init.9,v 1.2 2019/12/06 10:42:33 mpi Exp $
+.\"	$OpenBSD: uvm_init.9,v 1.3 2020/04/23 07:57:27 mpi Exp $
 .\"	$NetBSD: uvm.9,v 1.14 2000/06/29 06:08:44 mrg Exp $
 .\"
 .\" Copyright (c) 1998 Matthew R. Green
@@ -28,7 +28,7 @@
 .\" XXX this manual sets nS to 1 or 0 in the description, to obtain
 .\" synopsis-like function prototypes.  any better way?
 .\"
-.Dd $Mdocdate: December 6 2019 $
+.Dd $Mdocdate: April 23 2020 $
 .Dt UVM_INIT 9
 .Os
 .Sh NAME
@@ -272,7 +272,7 @@ int nswapdev;	/* number of configured swap devices in system */
 int swpages;	/* number of PAGE_SIZE'ed swap pages */
 int swpginuse;	/* number of swap pages in use */
 int swpgonly;	/* number of swap pages in use, not also in RAM */
-int nswget;	/* number of times fault calls uvm_swap_get() */
+int nswget;	/* number of swap pages moved from disk to RAM */
 int nanon;	/* XXX number total of anon's in system */
 int unused05;	/* formerly nanonneeded */
 int unused06;	/* formerly nfreeanon */
diff --git a/sys/uvm/uvmexp.h b/sys/uvm/uvmexp.h
index b2a98379a64..e3603b84d50 100644
--- a/sys/uvm/uvmexp.h
+++ b/sys/uvm/uvmexp.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uvmexp.h,v 1.4 2018/11/06 07:49:38 otto Exp $	*/
+/*	$OpenBSD: uvmexp.h,v 1.5 2020/04/23 07:57:27 mpi Exp $	*/
 
 #ifndef	_UVM_UVMEXP_
 #define	_UVM_UVMEXP_
@@ -78,7 +78,7 @@ struct uvmexp {
 	int swpages;	/* number of PAGE_SIZE'ed swap pages */
 	int swpginuse;	/* number of swap pages in use */
 	int swpgonly;	/* number of swap pages in use, not also in RAM */
-	int nswget;	/* number of times fault calls uvm_swap_get() */
+	int nswget;	/* number of swap pages moved from disk to RAM */
 	int nanon;	/* XXX number total of anon's in system */
 	int unused05;	/* formerly nanonneeded */
 	int unused06;	/* formerly nfreeanon */
diff --git a/usr.bin/systat/systat.1 b/usr.bin/systat/systat.1
index b670bc95958..5dab9544715 100644
--- a/usr.bin/systat/systat.1
+++ b/usr.bin/systat/systat.1
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: systat.1,v 1.116 2020/04/22 15:00:46 schwarze Exp $
+.\"	$OpenBSD: systat.1,v 1.117 2020/04/23 07:57:27 mpi Exp $
 .\"	$NetBSD: systat.1,v 1.6 1996/05/10 23:16:39 thorpej Exp $
 .\"
 .\" Copyright (c) 1985, 1990, 1993
@@ -30,7 +30,7 @@
 .\"
 .\"	@(#)systat.1	8.2 (Berkeley) 12/30/93
 .\"
-.Dd $Mdocdate: April 22 2020 $
+.Dd $Mdocdate: April 23 2020 $
 .Dt SYSTAT 1
 .Os
 .Sh NAME
@@ -715,8 +715,7 @@ swap pages in use
 .It swpgonly
 in use swap pages not in RAM
 .It nswget
-fault called
-.Fn uvm_swap_get
+swap pages moved from disk to RAM
 .It nanon
 total anon's
 .Pp
-- 
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