cgroups: improve logging

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
index 78f0cfa64341c0e5d1bc7c662d8ddcdec563c3e6..216296984889130e1cbf0cc09cb1ba13de2237d6 100644 (file)
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -504,7 +504,7 @@ static struct hierarchy *add_hierarchy(struct cgroup_ops *ops,
 
        TRACE("Adding cgroup hierarchy with mountpoint %s and base cgroup %s %s",
              mountpoint, container_base_path,
-             clist ? "with controllers " : "without any controllers");
+             (clist && *clist) ? "with controllers " : "without any controllers");
        for (char *const *it = clist; it && *it; it++)
                TRACE("%s", *it);