Embellish a comment regarding the reliability of DEBUG_VFS_LOCKS.

Submitted by:	kib

1 files changed, 3 insertions, 1 deletions

diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h
index acddfc0..6b07295 100644
--- a/sys/sys/vnode.h
+++ b/sys/sys/vnode.h
@@ -503,7 +503,9 @@ extern struct vnodeop_desc *vnodeop_descs[];
  * reliable since if the thread sleeps between changing the lock
  * state and checking it with the assert, some other thread could
  * change the state.  They are good enough for debugging a single
- * filesystem using a single-threaded test.
+ * filesystem using a single-threaded test.  Note that the unreliability is
+ * limited to false negatives; efforts were made to ensure that false
+ * positives cannot occur.
  */
 void	assert_vi_locked(struct vnode *vp, const char *str);
 void	assert_vi_unlocked(struct vnode *vp, const char *str);