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-rw-r--r--sbin/mdconfig/mdconfig.811
1 files changed, 9 insertions, 2 deletions
diff --git a/sbin/mdconfig/mdconfig.8 b/sbin/mdconfig/mdconfig.8
index 94559a68f4d8..fd7de3d0c09d 100644
--- a/sbin/mdconfig/mdconfig.8
+++ b/sbin/mdconfig/mdconfig.8
@@ -41,7 +41,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd November 11, 2007
+.Dd November 28, 2007
.Dt MDCONFIG 8
.Os
.Sh NAME
@@ -98,7 +98,14 @@ A file specified with
.Fl f Ar file
becomes the backing store for this memory disk.
.It Cm swap
-Swap space is used to back this memory disk.
+Storage for this type of memory disk is allocated from buffer
+memory. Pages get pushed out to the swap when the system is
+under memory pressure, otherwise they stay in the operating
+emory. Using
+.Cm swap
+backing is generally preferable over
+.Cm malloc
+backing.
.El
.It Fl f Ar file
Filename to use for the vnode type memory disk. Options