When creating the lxc cgroup directory, ignore -EEXIST

src/lxc/cgroup.c

@@ -419,10 +419,13 @@ static int lxc_one_cgroup_create(const char *name,
 	}
 
 	/* if cgparent does not exist, create it */
-	if (access(cgparent, F_OK) && mkdir(cgparent, 0755)) {
+	if (access(cgparent, F_OK)) {
+		ret = mkdir(cgparent, 0755);
+		if (ret == -1 && errno == EEXIST) {
 			SYSERROR("failed to create '%s' directory", cgparent);
 			return -1;
 		}
+	}
 
 	/*
 	 * There is a previous cgroup.  Try to delete it.  If that fails