Index: sys/fs/fuse/fuse_node.c
===================================================================
--- sys/fs/fuse/fuse_node.c	(revisione 242577)
+++ sys/fs/fuse/fuse_node.c	(copia locale)
@@ -127,6 +127,8 @@ int	fuse_fix_broken_io = 0;
 SYSCTL_INT(_vfs_fuse, OID_AUTO, fix_broken_io, CTLFLAG_RW,
     &fuse_fix_broken_io, 0, "");
 
+extern int fuse_debug_getattr;
+
 static void
 fuse_vnode_init(struct vnode *vp, struct fuse_vnode_data *fvdat,
     uint64_t nodeid, enum vtype vtyp)
@@ -289,6 +291,10 @@ fuse_isvalid_attr(struct vnode *vp)
 	struct timespec uptsp;
 
 	nanouptime(&uptsp);
+	if (fuse_debug_getattr)
+		printf("tvp sec: %l, uvp sec: %l, tvp nsec: %l, uvp nsec: %l\n",
+		    uptsp.tv_sec, (fvdat->cached_attrs_valid).tv_sec,
+		    uptsp.tv_nsec, (fvdat->cached_attrs_valid).tv_nsec);
 	return fuse_timespec_cmp(&uptsp, &fvdat->cached_attrs_valid, <=);
 }
 
Index: sys/fs/fuse/fuse_vnops.c
===================================================================
--- sys/fs/fuse/fuse_vnops.c	(revisione 242577)
+++ sys/fs/fuse/fuse_vnops.c	(copia locale)
@@ -179,6 +179,11 @@ int	fuse_lookup_cache_enable = 1;
 SYSCTL_INT(_vfs_fuse, OID_AUTO, lookup_cache_enable, CTLFLAG_RW,
     &fuse_lookup_cache_enable, 0, "");
 
+int	fuse_debug_getattr = 0;
+
+SYSCTL_INT(_vfs_fuse, OID_AUTO, debug_getattr, CTLFLAG_RW,
+    &fuse_debug_getattr, 0, "");
+
 /*
  * XXX: This feature is highly experimental and can bring to instabilities,
  * needs revisiting before to be enabled by default.
@@ -485,11 +490,17 @@ fuse_vnop_getattr(struct vop_getattr_args *ap)
 	/* look for cached attributes */
 	if (fuse_isvalid_attr(vp)) {
 		if (vap != VTOVA(vp)) {
+			if (fuse_debug_getattr)
+				printf("trick 2\n");
 			memcpy(vap, VTOVA(vp), sizeof(*vap));
 		}
 		if ((fvdat->flag & FN_SIZECHANGE) != 0) {
+			if (fuse_debug_getattr)
+				printf("trick 3\n");
 			vap->va_size = fvdat->filesize;
 		}
+		if (fuse_debug_getattr)
+			printf("end trick\n");
 		debug_printf("return cached: inode=%ju\n", (uintmax_t)VTOI(vp));
 		return 0;
 	}