diff -urN /usr/src/sys/kern/vfs_subr.c src/sys/kern/vfs_subr.c
--- /usr/src/sys/kern/vfs_subr.c	Fri Aug  5 22:59:13 2005
+++ src/sys/kern/vfs_subr.c	Fri Aug  5 23:44:07 2005
@@ -896,6 +896,8 @@
 	if (mp != NULL) {
 		insmntque(vp, mp);
 		bo->bo_bsize = mp->mnt_stat.f_iosize;
+		if ((mp->mnt_kern_flag & MNTK_NOKNOTE) != 0)
+			vp->v_vflag |= VV_NOKNOTE;
 	}
 
 	CTR2(KTR_VFS, "getnewvnode: mp %p vp %p", mp, vp);
diff -urN /usr/src/sys/sys/mount.h src/sys/sys/mount.h
--- /usr/src/sys/sys/mount.h	Fri Jul  1 18:28:32 2005
+++ src/sys/sys/mount.h	Fri Aug  5 23:58:47 2005
@@ -552,15 +552,13 @@
 
 #define VFS_KNOTE_LOCKED(vp, hint) do					\
 {									\
-	if ((vp)->v_mount &&						\
-	    ((vp)->v_mount->mnt_kern_flag & MNTK_NOKNOTE) == 0)		\
+	if (((vp)->v_vflag & VV_NOKNOTE) == 0)				\
 		VN_KNOTE((vp), (hint), 1);				\
 } while (0)
 
 #define VFS_KNOTE_UNLOCKED(vp, hint) do					\
 {									\
-	if ((vp)->v_mount &&						\
-	    ((vp)->v_mount->mnt_kern_flag & MNTK_NOKNOTE) == 0)		\
+	if (((vp)->v_vflag & VV_NOKNOTE) == 0)				\
 		VN_KNOTE((vp), (hint), 0);				\
 } while (0)
 
diff -urN /usr/src/sys/sys/vnode.h src/sys/sys/vnode.h
--- /usr/src/sys/sys/vnode.h	Fri Aug  5 23:00:16 2005
+++ src/sys/sys/vnode.h	Fri Aug  5 23:35:58 2005
@@ -251,6 +251,7 @@
 #define	VV_COPYONWRITE	0x0040	/* vnode is doing copy-on-write */
 #define	VV_SYSTEM	0x0080	/* vnode being used by kernel */
 #define	VV_PROCDEP	0x0100	/* vnode is process dependent */
+#define	VV_NOKNOTE	0x0200	/* don't activate knotes on this vnode */
 
 /*
  * Vnode attributes.  A field value of VNOVAL represents a field whose value