The purpose of the memcg_drain_all_list_lrus() is list_lrus reparenting.
It is very similar to memcg_reparent_objcgs(). Rename it to
memcg_reparent_list_lrus() so that the name can more consistent with
memcg_reparent_objcgs().
Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
---
include/linux/list_lru.h | 2 +-
mm/list_lru.c | 24 ++++++++++++------------
mm/memcontrol.c | 6 +++---
3 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h
index c36db6dc2a65..4b00fd8cb373 100644
--- a/include/linux/list_lru.h
+++ b/include/linux/list_lru.h
@@ -78,7 +78,7 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware,
int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru,
gfp_t gfp);
int memcg_update_all_list_lrus(int num_memcgs);
-void memcg_drain_all_list_lrus(struct mem_cgroup *src, struct mem_cgroup *dst);
+void memcg_reparent_list_lrus(struct mem_cgroup *memcg, struct mem_cgroup *parent);
/**
* list_lru_add: add an element to the lru list's tail
diff --git a/mm/list_lru.c b/mm/list_lru.c
index fc938d8ff48f..488dacd1f8ff 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -457,8 +457,8 @@ int memcg_update_all_list_lrus(int new_size)
return ret;
}
-static void memcg_drain_list_lru_node(struct list_lru *lru, int nid,
- int src_idx, struct mem_cgroup *dst_memcg)
+static void memcg_reparent_list_lru_node(struct list_lru *lru, int nid,
+ int src_idx, struct mem_cgroup *dst_memcg)
{
struct list_lru_node *nlru = &lru->node[nid];
int dst_idx = dst_memcg->kmemcg_id;
@@ -486,22 +486,22 @@ static void memcg_drain_list_lru_node(struct list_lru *lru, int nid,
spin_unlock_irq(&nlru->lock);
}
-static void memcg_drain_list_lru(struct list_lru *lru,
- int src_idx, struct mem_cgroup *dst_memcg)
+static void memcg_reparent_list_lru(struct list_lru *lru,
+ int src_idx, struct mem_cgroup *dst_memcg)
{
int i;
for_each_node(i)
- memcg_drain_list_lru_node(lru, i, src_idx, dst_memcg);
+ memcg_reparent_list_lru_node(lru, i, src_idx, dst_memcg);
memcg_list_lru_free(lru, src_idx);
}
-void memcg_drain_all_list_lrus(struct mem_cgroup *src, struct mem_cgroup *dst)
+void memcg_reparent_list_lrus(struct mem_cgroup *memcg, struct mem_cgroup *parent)
{
struct cgroup_subsys_state *css;
struct list_lru *lru;
- int src_idx = src->kmemcg_id;
+ int src_idx = memcg->kmemcg_id;
/*
* Change kmemcg_id of this cgroup and all its descendants to the
@@ -517,17 +517,17 @@ void memcg_drain_all_list_lrus(struct mem_cgroup *src, struct mem_cgroup *dst)
* call.
*/
rcu_read_lock();
- css_for_each_descendant_pre(css, &src->css) {
- struct mem_cgroup *memcg;
+ css_for_each_descendant_pre(css, &memcg->css) {
+ struct mem_cgroup *child;
- memcg = mem_cgroup_from_css(css);
- memcg->kmemcg_id = dst->kmemcg_id;
+ child = mem_cgroup_from_css(css);
+ child->kmemcg_id = parent->kmemcg_id;
}
rcu_read_unlock();
mutex_lock(&list_lrus_mutex);
list_for_each_entry(lru, &memcg_list_lrus, list)
- memcg_drain_list_lru(lru, src_idx, dst);
+ memcg_reparent_list_lru(lru, src_idx, parent);
mutex_unlock(&list_lrus_mutex);
}
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 94d8f742c32e..a19b1a1c8ea9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3644,7 +3644,7 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg)
memcg_reparent_objcgs(memcg, parent);
/*
- * memcg_drain_all_list_lrus() can change memcg->kmemcg_id.
+ * memcg_reparent_list_lrus() can change memcg->kmemcg_id.
* Cache it to local @kmemcg_id.
*/
kmemcg_id = memcg->kmemcg_id;
@@ -3653,9 +3653,9 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg)
* After we have finished memcg_reparent_objcgs(), all list_lrus
* corresponding to this cgroup are guaranteed to remain empty.
* The ordering is imposed by list_lru_node->lock taken by
- * memcg_drain_all_list_lrus().
+ * memcg_reparent_list_lrus().
*/
- memcg_drain_all_list_lrus(memcg, parent);
+ memcg_reparent_list_lrus(memcg, parent);
memcg_free_cache_id(kmemcg_id);
}
--
2.11.0
