diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 6f5f375b12d..a57b2ba80b3 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -1928,6 +1928,7 @@ vget(vp, flags, td)
 {
 	int oweinact;
 	int oldflags;
+	int usecount;
 	int error;
 
 	error = 0;
@@ -1949,6 +1950,7 @@ vget(vp, flags, td)
 		flags |= LK_EXCLUSIVE;
 		oweinact = 1;
 	}
+	usecount = vp->v_usecount;
 	v_incr_usecount(vp);
 	if ((error = vn_lock(vp, flags | LK_INTERLOCK, td)) != 0) {
 		VI_LOCK(vp);
@@ -1959,6 +1961,24 @@ vget(vp, flags, td)
 		 * active.
 		 */
 		v_decr_usecount(vp);
+		/*
+		 * Print warning when race below occur:
+		 *
+		 * thread1	thread2
+		 * -------	-------
+		 *					v_usecount=0
+		 * vref(vp)				v_usecount=1
+		 *		vget(vp)
+		 *		v_incr_usecount(vp)	v_usecount=2
+		 *		vn_lock(vp)
+		 * vrele(vp)				v_usecount=1
+		 *		v_decr_usecount(vp)	v_usecount=0
+		 *
+		 * In such situation VOP_INACTIVE() will not be called for
+		 * the vnode vp.
+		 */
+		if (usecount > 0 && vp->v_usecount == 0)
+			printf("vinactive() won't be called for vp=%p\n", vp);
 		return (error);
 	}
 	if (vp->v_iflag & VI_DOOMED && (flags & LK_RETRY) == 0)