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-rw-r--r--share/man/man4/pf.47
1 files changed, 5 insertions, 2 deletions
diff --git a/share/man/man4/pf.4 b/share/man/man4/pf.4
index f290a9b6d268..b7b504d45e10 100644
--- a/share/man/man4/pf.4
+++ b/share/man/man4/pf.4
@@ -28,7 +28,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd September 18 2012
+.Dd November 14, 2013
.Dt PF 4
.Os
.Sh NAME
@@ -1181,5 +1181,8 @@ packet filtering mechanism first appeared in
and then
.Fx 5.2 .
.Pp
-This implementation matches
+This implementation is derived from
.Ox 4.5 .
+It has been heavily modified to be capable of running in multithreaded
+.Fx
+kernel and scale its performance on multiple CPUs.