cgroup: don't ever try to destroy the cgroup of the root slice

The root slice is after all the root cgroup, so don't attempt to delete
it.

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index b9ef00c..d0f36cb 100644 (file)
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -531,7 +531,7 @@ void unit_destroy_cgroup(Unit *u) {
         if (!u->cgroup_path)
                 return;
 
-        r = cg_trim_with_mask(u->cgroup_mask, u->cgroup_path, true);
+        r = cg_trim_with_mask(u->cgroup_mask, u->cgroup_path, !unit_has_name(u, SPECIAL_ROOT_SLICE));
         if (r < 0)
                 log_debug("Failed to destroy cgroup %s: %s", u->cgroup_path, strerror(-r));