diff -Nru LVM2-orig//lib/activate/activate.c LVM2-working//lib/activate/activate.c
--- LVM2-orig//lib/activate/activate.c	2008-06-08 19:33:15.000000000 +0800
+++ LVM2-working//lib/activate/activate.c	2009-10-19 14:45:59.000000000 +0800
@@ -582,7 +582,7 @@
 	return r;
 }
 
-static int _lv_preload(struct logical_volume *lv)
+static int _lv_preload(struct logical_volume *lv, int *flush_required)
 {
 	int r;
 	struct dev_manager *dm;
@@ -590,7 +590,7 @@
 	if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
 		return_0;
 
-	if (!(r = dev_manager_preload(dm, lv)))
+	if (!(r = dev_manager_preload(dm, lv, flush_required)))
 		stack;
 
 	dev_manager_destroy(dm);
@@ -612,7 +612,7 @@
 	return r;
 }
 
-static int _lv_suspend_lv(struct logical_volume *lv, int lockfs)
+static int _lv_suspend_lv(struct logical_volume *lv, int lockfs, int flush_required)
 {
 	int r;
 	struct dev_manager *dm;
@@ -620,7 +620,7 @@
 	if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
 		return_0;
 
-	if (!(r = dev_manager_suspend(dm, lv, lockfs)))
+	if (!(r = dev_manager_suspend(dm, lv, lockfs, flush_required)))
 		stack;
 
 	dev_manager_destroy(dm);
@@ -838,7 +838,7 @@
 {
 	struct logical_volume *lv, *lv_pre;
 	struct lvinfo info;
-	int lockfs = 0;
+	int lockfs = 0, flush_required = 0;
 
 	if (!activation())
 		return 1;
@@ -863,7 +863,7 @@
 
 	/* If VG was precommitted, preload devices for the LV */
 	if ((lv_pre->vg->status & PRECOMMITTED)) {
-		if (!_lv_preload(lv_pre)) {
+		if (!_lv_preload(lv_pre, &flush_required)) {
 			/* FIXME Revert preloading */
 			return_0;
 		}
@@ -878,7 +878,7 @@
 	if (lv_is_origin(lv_pre) || lv_is_cow(lv_pre))
 		lockfs = 1;
 
-	if (!_lv_suspend_lv(lv, lockfs)) {
+	if (!_lv_suspend_lv(lv, lockfs, flush_required)) {
 		memlock_dec();
 		fs_unlock();
 		return 0;
diff -Nru LVM2-orig//lib/activate/dev_manager.c LVM2-working//lib/activate/dev_manager.c
--- LVM2-orig//lib/activate/dev_manager.c	2008-06-18 19:32:14.000000000 +0800
+++ LVM2-working//lib/activate/dev_manager.c	2009-10-19 14:43:48.000000000 +0800
@@ -50,6 +50,7 @@
 	const char *stripe_filler;
 	void *target_state;
 	uint32_t pvmove_mirror_count;
+	int flush_required;
 
 	char *vg_name;
 };
@@ -1072,7 +1073,7 @@
 		break;
 	case SUSPEND:
 		dm_tree_skip_lockfs(root);
-		if ((lv->status & MIRRORED) && !(lv->status & PVMOVE))
+		if (!dm->flush_required && (lv->status & MIRRORED) && !(lv->status & PVMOVE))
 			dm_tree_use_no_flush_suspend(root);
 	case SUSPEND_WITH_LOCKFS:
 		if (!dm_tree_suspend_children(root, dlid, ID_LEN + sizeof(UUID_PREFIX) - 1))
@@ -1088,6 +1089,9 @@
 		if (!dm_tree_preload_children(root, dlid, ID_LEN + sizeof(UUID_PREFIX) - 1))
 			goto_out;
 
+		if (dm_tree_node_size_changed(root))
+			dm->flush_required = 1;
+
 		if ((action == ACTIVATE) &&
 		    !dm_tree_activate_children(root, dlid, ID_LEN + sizeof(UUID_PREFIX) - 1))
 			goto_out;
@@ -1118,13 +1122,19 @@
 	return _tree_action(dm, lv, CLEAN);
 }
 
-int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv)
+int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv,
+			int *flush_required)
 {
 	/* FIXME Update the pvmove implementation! */
 	if ((lv->status & PVMOVE) || (lv->status & LOCKED))
 		return 1;
 
-	return _tree_action(dm, lv, PRELOAD);
+	if (!_tree_action(dm, lv, PRELOAD))
+		return 0;
+
+	*flush_required = dm->flush_required;
+
+	return 1;
 }
 
 int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv)
@@ -1139,8 +1149,10 @@
 }
 
 int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
-			int lockfs)
+			int lockfs, int flush_required)
 {
+	dm->flush_required = flush_required;
+
 	return _tree_action(dm, lv, lockfs ? SUSPEND_WITH_LOCKFS : SUSPEND);
 }
 
diff -Nru LVM2-orig//lib/activate/dev_manager.h LVM2-working//lib/activate/dev_manager.h
--- LVM2-orig//lib/activate/dev_manager.h	2007-11-13 04:51:53.000000000 +0800
+++ LVM2-working//lib/activate/dev_manager.h	2009-10-19 14:43:48.000000000 +0800
@@ -49,9 +49,10 @@
 			       struct logical_volume *lv, int wait,
 			       float *percent, uint32_t *event_nr);
 int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
-			int lockfs);
+			int lockfs, int flush_required);
 int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv);
-int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv);
+int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv,
+			int *flush_required);
 int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv);
 
 int dev_manager_lv_mknodes(const struct logical_volume *lv);
diff -Nru LVM2-orig//tools/lvresize.c LVM2-working//tools/lvresize.c
--- LVM2-orig//tools/lvresize.c	2008-04-29 23:25:28.000000000 +0800
+++ LVM2-working//tools/lvresize.c	2009-10-19 15:03:10.000000000 +0800
@@ -530,12 +530,6 @@
 			lp->resize = LV_EXTEND;
 	}
 
-	if (lp->mirrors && activation() &&
-	    lv_info(cmd, lv, &info, 0, 0) && info.exists) {
-		log_error("Mirrors cannot be resized while active yet.");
-		return ECMD_FAILED;
-	}
-
 	if (lv_is_origin(lv)) {
 		if (lp->resize == LV_REDUCE) {
 			log_error("Snapshot origin volumes cannot be reduced "