[PATCH v1 7/9] mm: memcg: guard memcg1-specific members of struct mem_cgroup_per_node

Roman Gushchin
2024-06-28T21:04:12Z

Put memcg1-specific members of struct mem_cgroup_per_node under the
CONFIG_MEMCG_V1 config option.

Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
---
include/linux/memcontrol.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 107b0c5d6eab..c7ef628ee882 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -92,6 +92,7 @@ struct mem_cgroup_per_node {
struct lruvec_stats *lruvec_stats;
struct shrinker_info __rcu *shrinker_info;

+#ifdef CONFIG_MEMCG_V1
/*
* Memcg-v1 only stuff in middle as buffer between read mostly fields
* and update often fields to avoid false sharing. Once v1 stuff is
@@ -102,6 +103,7 @@ struct mem_cgroup_per_node {
unsigned long usage_in_excess;/* Set to the value by which */
/* the soft limit is exceeded*/
bool on_tree;
+#endif

/* Fields which get updated often at the end. */
struct lruvec lruvec;
--
2.45.2.803.g4e1b14247a-goog