Index: kern_shutdown.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/kern_shutdown.c,v
retrieving revision 1.163
diff -u -r1.163 kern_shutdown.c
--- kern_shutdown.c	15 Aug 2004 19:17:23 -0000	1.163
+++ kern_shutdown.c	23 Aug 2004 13:45:23 -0000
@@ -285,6 +285,15 @@
 		waittime = 0;
 
 		sync(&thread0, NULL);
+
+		/* SOS22: Moved this to before the sync stage so that
+		   ext2 unmounts cleanly when we're shutting down.  I
+		   don't know whether this is actually safe, but it
+		   does appear to solve the problem without doing
+		   anything obviously bad. */
+		if (panicstr == 0) {
+			vfs_unmountall();
+		}
 
 		/*
 		 * With soft updates, some buffers that are