Commit 98c9daf5 authored Jun 28, 2024 by Roman Gushchin Committed by Andrew Morton Jul 04, 2024

mm: memcg: guard memcg1-specific members of struct mem_cgroup_per_node

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

Link: https://lkml.kernel.org/r/20240628210317.272856-8-roman.gushchin@linux.dev


Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent 94b7e5bf

include/linux/memcontrol.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;