memcg: rearrange code

This is a preparatory patch for easing the review of the follow up patch
which will reduce the memory overhead of memory cgroups.

Link: https://lkml.kernel.org/r/20220907043537.3457014-3-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0a44a733bb03cc0236298431217b00fef7e43c0f..78fd7cfb4f9296a8ad472675e593e46191b92a8f 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -669,6 +669,29 @@ static void flush_memcg_stats_dwork(struct work_struct *w)
        queue_delayed_work(system_unbound_wq, &stats_flush_dwork, FLUSH_TIME);
 }
 
+/* Subset of vm_event_item to report for memcg event stats */
+static const unsigned int memcg_vm_event_stat[] = {
+       PGSCAN_KSWAPD,
+       PGSCAN_DIRECT,
+       PGSTEAL_KSWAPD,
+       PGSTEAL_DIRECT,
+       PGFAULT,
+       PGMAJFAULT,
+       PGREFILL,
+       PGACTIVATE,
+       PGDEACTIVATE,
+       PGLAZYFREE,
+       PGLAZYFREED,
+#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP)
+       ZSWPIN,
+       ZSWPOUT,
+#endif
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+       THP_FAULT_ALLOC,
+       THP_COLLAPSE_ALLOC,
+#endif
+};
+
 struct memcg_vmstats_percpu {
        /* Local (CPU and cgroup) page state & events */
        long                    state[MEMCG_NR_STAT];
@@ -1501,29 +1524,6 @@ static inline unsigned long memcg_page_state_output(struct mem_cgroup *memcg,
        return memcg_page_state(memcg, item) * memcg_page_state_unit(item);
 }
 
-/* Subset of vm_event_item to report for memcg event stats */
-static const unsigned int memcg_vm_event_stat[] = {
-       PGSCAN_KSWAPD,
-       PGSCAN_DIRECT,
-       PGSTEAL_KSWAPD,
-       PGSTEAL_DIRECT,
-       PGFAULT,
-       PGMAJFAULT,
-       PGREFILL,
-       PGACTIVATE,
-       PGDEACTIVATE,
-       PGLAZYFREE,
-       PGLAZYFREED,
-#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP)
-       ZSWPIN,
-       ZSWPOUT,
-#endif
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-       THP_FAULT_ALLOC,
-       THP_COLLAPSE_ALLOC,
-#endif
-};
-
 static void memory_stat_format(struct mem_cgroup *memcg, char *buf, int bufsize)
 {
        struct seq_buf s;