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Date: Fri, 12 Apr 2019 11:15:05 -0400
From: Johannes Weiner <hannes@...xchg.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, cgroups@...r.kernel.org,
linux-kernel@...r.kernel.org, kernel-team@...com
Subject: [PATCH 2/4] mm: memcontrol: move stat/event counting functions out-of-line
These are getting too big to be inlined in every callsite. They were
stolen from vmstat.c, which already out-of-lines them, and they have
only been growing since. The callsites aren't that hot, either.
Move __mod_memcg_state()
__mod_lruvec_state() and
__count_memcg_events() out of line and add kerneldoc comments.
Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
include/linux/memcontrol.h | 62 +++---------------------------
mm/memcontrol.c | 79 ++++++++++++++++++++++++++++++++++++++
2 files changed, 84 insertions(+), 57 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 139be7d44c29..cae7d1b11eea 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -580,22 +580,7 @@ static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg,
return x;
}
-/* idx can be of type enum memcg_stat_item or node_stat_item */
-static inline void __mod_memcg_state(struct mem_cgroup *memcg,
- int idx, int val)
-{
- long x;
-
- if (mem_cgroup_disabled())
- return;
-
- x = val + __this_cpu_read(memcg->vmstats_percpu->stat[idx]);
- if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) {
- atomic_long_add(x, &memcg->vmstats[idx]);
- x = 0;
- }
- __this_cpu_write(memcg->vmstats_percpu->stat[idx], x);
-}
+void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val);
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void mod_memcg_state(struct mem_cgroup *memcg,
@@ -657,31 +642,8 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
return x;
}
-static inline void __mod_lruvec_state(struct lruvec *lruvec,
- enum node_stat_item idx, int val)
-{
- struct mem_cgroup_per_node *pn;
- long x;
-
- /* Update node */
- __mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
-
- if (mem_cgroup_disabled())
- return;
-
- pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
-
- /* Update memcg */
- __mod_memcg_state(pn->memcg, idx, val);
-
- /* Update lruvec */
- x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]);
- if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) {
- atomic_long_add(x, &pn->lruvec_stat[idx]);
- x = 0;
- }
- __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x);
-}
+void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx,
+ int val);
static inline void mod_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx, int val)
@@ -723,22 +685,8 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
gfp_t gfp_mask,
unsigned long *total_scanned);
-static inline void __count_memcg_events(struct mem_cgroup *memcg,
- enum vm_event_item idx,
- unsigned long count)
-{
- unsigned long x;
-
- if (mem_cgroup_disabled())
- return;
-
- x = count + __this_cpu_read(memcg->vmstats_percpu->events[idx]);
- if (unlikely(x > MEMCG_CHARGE_BATCH)) {
- atomic_long_add(x, &memcg->vmevents[idx]);
- x = 0;
- }
- __this_cpu_write(memcg->vmstats_percpu->events[idx], x);
-}
+void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx,
+ unsigned long count);
static inline void count_memcg_events(struct mem_cgroup *memcg,
enum vm_event_item idx,
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 109608b8091f..3535270ebeec 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -687,6 +687,85 @@ mem_cgroup_largest_soft_limit_node(struct mem_cgroup_tree_per_node *mctz)
return mz;
}
+/**
+ * __mod_memcg_state - update cgroup memory statistics
+ * @memcg: the memory cgroup
+ * @idx: the stat item - can be enum memcg_stat_item or enum node_stat_item
+ * @val: delta to add to the counter, can be negative
+ */
+void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val)
+{
+ long x;
+
+ if (mem_cgroup_disabled())
+ return;
+
+ x = val + __this_cpu_read(memcg->vmstats_percpu->stat[idx]);
+ if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) {
+ atomic_long_add(x, &memcg->vmstats[idx]);
+ x = 0;
+ }
+ __this_cpu_write(memcg->vmstats_percpu->stat[idx], x);
+}
+
+/**
+ * __mod_lruvec_state - update lruvec memory statistics
+ * @lruvec: the lruvec
+ * @idx: the stat item
+ * @val: delta to add to the counter, can be negative
+ *
+ * The lruvec is the intersection of the NUMA node and a cgroup. This
+ * function updates the all three counters that are affected by a
+ * change of state at this level: per-node, per-cgroup, per-lruvec.
+ */
+void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx,
+ int val)
+{
+ struct mem_cgroup_per_node *pn;
+ long x;
+
+ /* Update node */
+ __mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
+
+ if (mem_cgroup_disabled())
+ return;
+
+ pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
+
+ /* Update memcg */
+ __mod_memcg_state(pn->memcg, idx, val);
+
+ /* Update lruvec */
+ x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]);
+ if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) {
+ atomic_long_add(x, &pn->lruvec_stat[idx]);
+ x = 0;
+ }
+ __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x);
+}
+
+/**
+ * __count_memcg_events - account VM events in a cgroup
+ * @memcg: the memory cgroup
+ * @idx: the event item
+ * @count: the number of events that occured
+ */
+void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx,
+ unsigned long count)
+{
+ unsigned long x;
+
+ if (mem_cgroup_disabled())
+ return;
+
+ x = count + __this_cpu_read(memcg->vmstats_percpu->events[idx]);
+ if (unlikely(x > MEMCG_CHARGE_BATCH)) {
+ atomic_long_add(x, &memcg->vmevents[idx]);
+ x = 0;
+ }
+ __this_cpu_write(memcg->vmstats_percpu->events[idx], x);
+}
+
static unsigned long memcg_events_local(struct mem_cgroup *memcg,
int event)
{
--
2.21.0
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