Index: LVM2.2.02.39/lib/mirror/mirrored.c
===================================================================
--- LVM2.2.02.39.orig/lib/mirror/mirrored.c	2008-04-11 02:53:36.000000000 +0800
+++ LVM2.2.02.39/lib/mirror/mirrored.c	2010-03-17 16:42:29.000000000 +0800
@@ -376,7 +376,7 @@
 	 * FIXME: Fails incorrectly if cmirror was built into kernel.
 	 */
 	if (attributes) {
-		if (!_mirror_attributes && module_present("cmirror"))
+		if (!_mirror_attributes && module_present("log-userspace"))
 			_mirror_attributes |= MIRROR_LOG_CLUSTERED;
 		*attributes = _mirror_attributes;
 	}
Index: LVM2.2.02.39/lib/activate/activate.c
===================================================================
--- LVM2.2.02.39.orig/lib/activate/activate.c	2010-03-17 16:42:29.000000000 +0800
+++ LVM2.2.02.39/lib/activate/activate.c	2010-03-17 17:21:20.000000000 +0800
@@ -408,6 +408,26 @@
 	return ret;
 }
 
+/* 0 on not running, 1 on running */
+static int check_cmirrord()
+{
+	int fd;
+	int ret = 0;
+	struct flock lock;
+	if (( fd = open("/var/run/cmirrord.pid", O_WRONLY)) >= 0)
+	{
+		lock.l_type = F_WRLCK;
+		lock.l_start = 0;
+		lock.l_whence = SEEK_SET;
+		lock.l_len = 0;
+		if (fcntl(fd, F_SETLK, &lock) < 0) {
+			ret = 1;
+		}
+		close(fd);
+	}
+	return ret;
+}
+
 int target_present(const char *target_name, int use_modprobe)
 {
 	uint32_t maj, min, patchlevel;
@@ -415,6 +435,16 @@
 	if (!activation())
 		return 0;
 
+	if (!strncmp(target_name, "log-userspace", 13)) {
+		/*
+		   When the target_name is log-userspace, it also means
+		   we need cmirrord daemon running. It doesn't work alone.
+		 */
+		if (!check_cmirrord())
+			log_error("cmirrord is required, but not running now.");
+			return_0;
+	}
+
 #ifdef MODPROBE_CMD
 	if (use_modprobe) {
 		if (target_version(target_name, &maj, &min, &patchlevel))