diff --git a/nova/scheduler/host_manager.py b/nova/scheduler/host_manager.py
index 4a9a372523d6..aab4b90ac53f 100644
--- a/nova/scheduler/host_manager.py
+++ b/nova/scheduler/host_manager.py
@@ -750,7 +750,13 @@ class HostManager(object):
                      'instance info for this host.', host_name)
             return {}
         with context_module.target_cell(context, hm.cell_mapping) as cctxt:
-            inst_list = objects.InstanceList.get_by_host(cctxt, host_name)
+            # NOTE(mriedem): We pass expected_attrs=[] to avoid a default
+            # join on info_cache and security_groups, which at present none
+            # of the in-tree filters/weighers rely on that information. Any
+            # out of tree filters which rely on it will end up lazy-loading
+            # the field but we don't have a contract on out of tree filters.
+            inst_list = objects.InstanceList.get_by_host(
+                cctxt, host_name, expected_attrs=[])
             return {inst.uuid: inst for inst in inst_list}
 
     def _get_instance_info(self, context, compute):
diff --git a/nova/tests/unit/scheduler/test_host_manager.py b/nova/tests/unit/scheduler/test_host_manager.py
index cec47588f779..bfddb0ce6ec4 100644
--- a/nova/tests/unit/scheduler/test_host_manager.py
+++ b/nova/tests/unit/scheduler/test_host_manager.py
@@ -750,7 +750,8 @@ class HostManagerTestCase(test.NoDBTestCase):
         mock_get_by_host.return_value = objects.InstanceList(objects=[inst1])
         host_state.update(
                 inst_dict=hm._get_instance_info(context, cn1))
-        mock_get_by_host.assert_called_once_with(context, cn1.host)
+        mock_get_by_host.assert_called_once_with(
+            context, cn1.host, expected_attrs=[])
         self.assertTrue(host_state.instances)
         self.assertEqual(host_state.instances[uuids.instance], inst1)