--- /usr/src/sys/kern/kern_lock.c	Sun Jan 13 17:11:54 2008
+++ kern/kern_lock.c	Wed Jan 16 20:47:58 2008
@@ -105,7 +105,12 @@
 	panic("lockmgr locks do not support sleep interlocking");
 }
 
-#define	COUNT(td, x)	((td)->td_locks += (x))
+#define	COUNT(td, x) do {						\
+		CTR2(KTR_SPARE2, "thread %p bumping locks of %d", (td),	\
+		    (x));						\
+		(td)->td_locks += (x);					\
+} while (0)
+
 #define LK_ALL (LK_HAVE_EXCL | LK_WANT_EXCL | LK_WANT_UPGRADE | \
 	LK_SHARE_NONZERO | LK_WAIT_NONZERO)
 
@@ -555,8 +560,10 @@
 	 * owner can be alredy KERNPROC, so in that case just skip the
 	 * decrement.
 	 */
-	if (lkp->lk_lockholder == td)
+	if (lkp->lk_lockholder == td) {
+		CTR1(KTR_SPARE2, "thread %p bumping locks of -1", td);
 		td->td_locks--;
+	}
 	lkp->lk_lockholder = LK_KERNPROC;
 }