--- src/bin/ps/ps.1	2004/07/29 09:20:39	1.3
+++ src/bin/ps/ps.1	2004/09/14 07:52:03	1.4
@@ -292,6 +292,10 @@ The process is trying to exit.
 .It L
 The process has pages locked in core (for example, for raw
 .Tn I/O ) .
+.It M
+On SMP systems indicates a process or thread which is
+.Em not
+holding the MP lock (the Big Giant Lock).
 .It N
 The process has reduced
 .Tn CPU