From 7fa8a5713052175e779b51148f627af5afab5648 Mon Sep 17 00:00:00 2001
From: Tom Rhodes <trhodes@FreeBSD.org>
Date: Sat, 24 Jan 2009 01:46:46 +0000
Subject: [PATCH] Add a comment on kern.ipc.maxpipekva.

PR:		105997
Reviewed by:	keramida
---
 share/man/man7/tuning.7 | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/share/man/man7/tuning.7 b/share/man/man7/tuning.7
index 45aee264516b..f95047b7f276 100644
--- a/share/man/man7/tuning.7
+++ b/share/man/man7/tuning.7
@@ -23,7 +23,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 19, 2007
+.Dd January 23, 2009
 .Dt TUNING 7
 .Os
 .Sh NAME
@@ -402,6 +402,16 @@ In this document we will only cover the ones that have the greatest effect
 on the system.
 .Pp
 The
+.Va kern.ipc.maxpipekva
+loader tunable is used to set a hard limit on the amount of pageable
+address space available.
+This value is auto tuned by the system, but may require manual tuning
+in a few rare cases.
+Increasing this value to a higher setting, such as `25165824' might
+improve performance on systems where pageable address space is
+quickly exhausted.
+.Pp
+The
 .Va kern.ipc.shm_use_phys
 sysctl defaults to 0 (off) and may be set to 0 (off) or 1 (on).
 Setting