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Date: Thu, 21 Jan 2021 15:06:15 -0800
From: Yang Shi <shy828301@...il.com>
To: guro@...com, ktkhai@...tuozzo.com, shakeelb@...gle.com,
david@...morbit.com, hannes@...xchg.org, mhocko@...e.com,
akpm@...ux-foundation.org
Cc: shy828301@...il.com, linux-mm@...ck.org,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [v4 PATCH 05/11] mm: memcontrol: rename shrinker_map to shrinker_info
The following patch is going to add nr_deferred into shrinker_map, the change will
make shrinker_map not only include map anymore, so rename it to a more general
name. And this should make the patch adding nr_deferred cleaner and readable and make
review easier. Rename "memcg_shrinker_info" to "shrinker_info" as well.
Signed-off-by: Yang Shi <shy828301@...il.com>
---
include/linux/memcontrol.h | 8 ++---
mm/memcontrol.c | 6 ++--
mm/vmscan.c | 64 +++++++++++++++++++-------------------
3 files changed, 39 insertions(+), 39 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 0ee2924991fb..62b888b88a5f 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -96,7 +96,7 @@ struct lruvec_stat {
* Bitmap of shrinker::id corresponding to memcg-aware shrinkers,
* which have elements charged to this memcg.
*/
-struct memcg_shrinker_map {
+struct shrinker_info {
struct rcu_head rcu;
unsigned long map[];
};
@@ -118,7 +118,7 @@ struct mem_cgroup_per_node {
struct mem_cgroup_reclaim_iter iter;
- struct memcg_shrinker_map __rcu *shrinker_map;
+ struct shrinker_info __rcu *shrinker_info;
struct rb_node tree_node; /* RB tree node */
unsigned long usage_in_excess;/* Set to the value by which */
@@ -1581,8 +1581,8 @@ static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
return false;
}
-extern int alloc_shrinker_maps(struct mem_cgroup *memcg);
-extern void free_shrinker_maps(struct mem_cgroup *memcg);
+extern int alloc_shrinker_info(struct mem_cgroup *memcg);
+extern void free_shrinker_info(struct mem_cgroup *memcg);
extern void set_shrinker_bit(struct mem_cgroup *memcg,
int nid, int shrinker_id);
#else
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 76a557520a1a..65d9eb0215b5 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5248,11 +5248,11 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css)
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
/*
- * A memcg must be visible for expand_shrinker_maps()
+ * A memcg must be visible for expand_shrinker_info()
* by the time the maps are allocated. So, we allocate maps
* here, when for_each_mem_cgroup() can't skip it.
*/
- if (alloc_shrinker_maps(memcg)) {
+ if (alloc_shrinker_info(memcg)) {
mem_cgroup_id_remove(memcg);
return -ENOMEM;
}
@@ -5316,7 +5316,7 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
vmpressure_cleanup(&memcg->vmpressure);
cancel_work_sync(&memcg->high_work);
mem_cgroup_remove_from_trees(memcg);
- free_shrinker_maps(memcg);
+ free_shrinker_info(memcg);
memcg_free_kmem(memcg);
mem_cgroup_free(memcg);
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 40e7751ef961..dcb7f2913ace 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -187,20 +187,20 @@ static DECLARE_RWSEM(shrinker_rwsem);
#ifdef CONFIG_MEMCG
static int shrinker_nr_max;
-static void free_shrinker_map_rcu(struct rcu_head *head)
+static void free_shrinker_info_rcu(struct rcu_head *head)
{
- kvfree(container_of(head, struct memcg_shrinker_map, rcu));
+ kvfree(container_of(head, struct shrinker_info, rcu));
}
-static int expand_one_shrinker_map(struct mem_cgroup *memcg,
+static int expand_one_shrinker_info(struct mem_cgroup *memcg,
int size, int old_size)
{
- struct memcg_shrinker_map *new, *old;
+ struct shrinker_info *new, *old;
int nid;
for_each_node(nid) {
old = rcu_dereference_protected(
- mem_cgroup_nodeinfo(memcg, nid)->shrinker_map, true);
+ mem_cgroup_nodeinfo(memcg, nid)->shrinker_info, true);
/* Not yet online memcg */
if (!old)
return 0;
@@ -213,17 +213,17 @@ static int expand_one_shrinker_map(struct mem_cgroup *memcg,
memset(new->map, (int)0xff, old_size);
memset((void *)new->map + old_size, 0, size - old_size);
- rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, new);
- call_rcu(&old->rcu, free_shrinker_map_rcu);
+ rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, new);
+ call_rcu(&old->rcu, free_shrinker_info_rcu);
}
return 0;
}
-void free_shrinker_maps(struct mem_cgroup *memcg)
+void free_shrinker_info(struct mem_cgroup *memcg)
{
struct mem_cgroup_per_node *pn;
- struct memcg_shrinker_map *map;
+ struct shrinker_info *info;
int nid;
if (mem_cgroup_is_root(memcg))
@@ -231,16 +231,16 @@ void free_shrinker_maps(struct mem_cgroup *memcg)
for_each_node(nid) {
pn = mem_cgroup_nodeinfo(memcg, nid);
- map = rcu_dereference_protected(pn->shrinker_map, true);
- if (map)
- kvfree(map);
- rcu_assign_pointer(pn->shrinker_map, NULL);
+ info = rcu_dereference_protected(pn->shrinker_info, true);
+ if (info)
+ kvfree(info);
+ rcu_assign_pointer(pn->shrinker_info, NULL);
}
}
-int alloc_shrinker_maps(struct mem_cgroup *memcg)
+int alloc_shrinker_info(struct mem_cgroup *memcg)
{
- struct memcg_shrinker_map *map;
+ struct shrinker_info *info;
int nid, size, ret = 0;
if (mem_cgroup_is_root(memcg))
@@ -249,20 +249,20 @@ int alloc_shrinker_maps(struct mem_cgroup *memcg)
down_write(&shrinker_rwsem);
size = (shrinker_nr_max / BITS_PER_LONG + 1) * sizeof(unsigned long);
for_each_node(nid) {
- map = kvzalloc_node(sizeof(*map) + size, GFP_KERNEL, nid);
- if (!map) {
- free_shrinker_maps(memcg);
+ info = kvzalloc_node(sizeof(*info) + size, GFP_KERNEL, nid);
+ if (!info) {
+ free_shrinker_info(memcg);
ret = -ENOMEM;
break;
}
- rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, map);
+ rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info);
}
up_write(&shrinker_rwsem);
return ret;
}
-static int expand_shrinker_maps(int new_id)
+static int expand_shrinker_info(int new_id)
{
int size, old_size, ret = 0;
int new_nr_max = new_id + 1;
@@ -280,7 +280,7 @@ static int expand_shrinker_maps(int new_id)
do {
if (mem_cgroup_is_root(memcg))
continue;
- ret = expand_one_shrinker_map(memcg, size, old_size);
+ ret = expand_one_shrinker_info(memcg, size, old_size);
if (ret) {
mem_cgroup_iter_break(NULL, memcg);
goto out;
@@ -297,13 +297,13 @@ static int expand_shrinker_maps(int new_id)
void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id)
{
if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) {
- struct memcg_shrinker_map *map;
+ struct shrinker_info *info;
rcu_read_lock();
- map = rcu_dereference(memcg->nodeinfo[nid]->shrinker_map);
+ info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info);
/* Pairs with smp mb in shrink_slab() */
smp_mb__before_atomic();
- set_bit(shrinker_id, map->map);
+ set_bit(shrinker_id, info->map);
rcu_read_unlock();
}
}
@@ -334,7 +334,7 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker)
goto unlock;
if (id >= shrinker_nr_max) {
- if (expand_shrinker_maps(id)) {
+ if (expand_shrinker_info(id)) {
idr_remove(&shrinker_idr, id);
goto unlock;
}
@@ -663,7 +663,7 @@ static unsigned long do_shrink_slab(struct shrink_control *shrinkctl,
static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid,
struct mem_cgroup *memcg, int priority)
{
- struct memcg_shrinker_map *map;
+ struct shrinker_info *info;
unsigned long ret, freed = 0;
int i;
@@ -673,12 +673,12 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid,
if (!down_read_trylock(&shrinker_rwsem))
return 0;
- map = rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_map,
- true);
- if (unlikely(!map))
+ info = rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info,
+ true);
+ if (unlikely(!info))
goto unlock;
- for_each_set_bit(i, map->map, shrinker_nr_max) {
+ for_each_set_bit(i, info->map, shrinker_nr_max) {
struct shrink_control sc = {
.gfp_mask = gfp_mask,
.nid = nid,
@@ -689,7 +689,7 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid,
shrinker = idr_find(&shrinker_idr, i);
if (unlikely(!shrinker || shrinker == SHRINKER_REGISTERING)) {
if (!shrinker)
- clear_bit(i, map->map);
+ clear_bit(i, info->map);
continue;
}
@@ -700,7 +700,7 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid,
ret = do_shrink_slab(&sc, shrinker, priority);
if (ret == SHRINK_EMPTY) {
- clear_bit(i, map->map);
+ clear_bit(i, info->map);
/*
* After the shrinker reported that it had no objects to
* free, but before we cleared the corresponding bit in
--
2.26.2
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