Index: vfs_subr.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/vfs_subr.c,v
retrieving revision 1.624
diff -u -r1.624 vfs_subr.c
--- vfs_subr.c	6 May 2005 02:48:20 -0000	1.624
+++ vfs_subr.c	10 May 2005 03:22:38 -0000
@@ -2660,6 +2660,7 @@
 {
 	struct mount *mp;
 	struct thread *td;
+	struct vnode *vp;
 	int error;
 
 	KASSERT(curthread != NULL, ("vfs_unmountall: NULL curthread"));
@@ -2669,6 +2670,24 @@
 	 */
 	while(!TAILQ_EMPTY(&mountlist)) {
 		mp = TAILQ_LAST(&mountlist, mntlist);
+		if(mp->mnt_nvnodelistsize > 0)
+		{
+			printf("vfs_unmountall: Processing %s:\n",
+				mp->mnt_stat.f_mntfromname);
+			
+			TAILQ_FOREACH(vp, &mp->mnt_nvnodelist, v_nmntvnodes)
+			{
+				/* vnodes that are of no interest:
+				 * - a vnode with a usecount of 0
+				 * - vnode marked VV_ROOT
+				 * - syncer vnode
+				 */
+				/* XXX vnode interlocking required? */
+				if(vp->v_usecount && (vp != mp->mnt_syncer) &&
+					!(vp->v_vflag & VV_ROOT))
+					vn_printf(vp, "%s", "");
+			}
+		}
 		error = dounmount(mp, MNT_FORCE, td);
 		if (error) {
 			TAILQ_REMOVE(&mountlist, mp, mnt_list);