[PATCH v2 2/5] mm: memcg: move vmstats structs definition above flushing code

Yosry Ahmed
2023-10-10T03:21:36Z

The following patch will make use of those structs in the flushing code,
so move their definitions (and a few other dependencies) a little bit up
to reduce the diff noise in the following patch.

No functional change intended.

Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
---
mm/memcontrol.c | 146 ++++++++++++++++++++++++------------------------
1 file changed, 73 insertions(+), 73 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4a194fcc9533..a393f1399a2b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -570,6 +570,79 @@ mem_cgroup_largest_soft_limit_node(struct mem_cgroup_tree_per_node *mctz)
return mz;
}

+/* Subset of vm_event_item to report for memcg event stats */
+static const unsigned int memcg_vm_event_stat[] = {
+ PGPGIN,
+ PGPGOUT,
+ PGSCAN_KSWAPD,
+ PGSCAN_DIRECT,
+ PGSCAN_KHUGEPAGED,
+ PGSTEAL_KSWAPD,
+ PGSTEAL_DIRECT,
+ PGSTEAL_KHUGEPAGED,
+ 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,
+ THP_SWPOUT,
+ THP_SWPOUT_FALLBACK,
+#endif
+};
+
+#define NR_MEMCG_EVENTS ARRAY_SIZE(memcg_vm_event_stat)
+static int mem_cgroup_events_index[NR_VM_EVENT_ITEMS] __read_mostly;
+
+static void init_memcg_events(void)
+{
+ int i;
+
+ for (i = 0; i < NR_MEMCG_EVENTS; ++i)
+ mem_cgroup_events_index[memcg_vm_event_stat[i]] = i + 1;
+}
+
+static inline int memcg_events_index(enum vm_event_item idx)
+{
+ return mem_cgroup_events_index[idx] - 1;
+}
+
+struct memcg_vmstats_percpu {
+ /* Local (CPU and cgroup) page state & events */
+ long state[MEMCG_NR_STAT];
+ unsigned long events[NR_MEMCG_EVENTS];
+
+ /* Delta calculation for lockless upward propagation */
+ long state_prev[MEMCG_NR_STAT];
+ unsigned long events_prev[NR_MEMCG_EVENTS];
+
+ /* Cgroup1: threshold notifications & softlimit tree updates */
+ unsigned long nr_page_events;
+ unsigned long targets[MEM_CGROUP_NTARGETS];
+};
+
+struct memcg_vmstats {
+ /* Aggregated (CPU and subtree) page state & events */
+ long state[MEMCG_NR_STAT];
+ unsigned long events[NR_MEMCG_EVENTS];
+
+ /* Non-hierarchical (CPU aggregated) page state & events */
+ long state_local[MEMCG_NR_STAT];
+ unsigned long events_local[NR_MEMCG_EVENTS];
+
+ /* Pending child counts during tree propagation */
+ long state_pending[MEMCG_NR_STAT];
+ unsigned long events_pending[NR_MEMCG_EVENTS];
+};
+
/*
* memcg and lruvec stats flushing
*
@@ -681,79 +754,6 @@ 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[] = {
- PGPGIN,
- PGPGOUT,
- PGSCAN_KSWAPD,
- PGSCAN_DIRECT,
- PGSCAN_KHUGEPAGED,
- PGSTEAL_KSWAPD,
- PGSTEAL_DIRECT,
- PGSTEAL_KHUGEPAGED,
- 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,
- THP_SWPOUT,
- THP_SWPOUT_FALLBACK,
-#endif
-};
-
-#define NR_MEMCG_EVENTS ARRAY_SIZE(memcg_vm_event_stat)
-static int mem_cgroup_events_index[NR_VM_EVENT_ITEMS] __read_mostly;
-
-static void init_memcg_events(void)
-{
- int i;
-
- for (i = 0; i < NR_MEMCG_EVENTS; ++i)
- mem_cgroup_events_index[memcg_vm_event_stat[i]] = i + 1;
-}
-
-static inline int memcg_events_index(enum vm_event_item idx)
-{
- return mem_cgroup_events_index[idx] - 1;
-}
-
-struct memcg_vmstats_percpu {
- /* Local (CPU and cgroup) page state & events */
- long state[MEMCG_NR_STAT];
- unsigned long events[NR_MEMCG_EVENTS];
-
- /* Delta calculation for lockless upward propagation */
- long state_prev[MEMCG_NR_STAT];
- unsigned long events_prev[NR_MEMCG_EVENTS];
-
- /* Cgroup1: threshold notifications & softlimit tree updates */
- unsigned long nr_page_events;
- unsigned long targets[MEM_CGROUP_NTARGETS];
-};
-
-struct memcg_vmstats {
- /* Aggregated (CPU and subtree) page state & events */
- long state[MEMCG_NR_STAT];
- unsigned long events[NR_MEMCG_EVENTS];
-
- /* Non-hierarchical (CPU aggregated) page state & events */
- long state_local[MEMCG_NR_STAT];
- unsigned long events_local[NR_MEMCG_EVENTS];
-
- /* Pending child counts during tree propagation */
- long state_pending[MEMCG_NR_STAT];
- unsigned long events_pending[NR_MEMCG_EVENTS];
-};
-
unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
{
long x = READ_ONCE(memcg->vmstats->state[idx]);
--
2.42.0.609.gbb76f46606-goog