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mm: list_lru: only add memcg-aware lrus to the global lru list 

The non-memcg-aware lru is always skiped when traversing the global lru
list, which is not efficient.  We can only add the memcg-aware lru to
the global lru list instead to make traversing more efficient.

Link: https://lkml.kernel.org/r/20211025124353.55781-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Muchun Song 2021-11-05 13:37:59 -07:00 committed by Linus Torvalds
parent e80216d9f1
commit 3eef11279b
1 changed files with 16 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
mm/list_lru.c
View File

@ -15,18 +15,29 @@
#include "slab.h"
#ifdef CONFIG_MEMCG_KMEM
static LIST_HEAD(list_lrus);
static LIST_HEAD(memcg_list_lrus);
static DEFINE_MUTEX(list_lrus_mutex);
static inline bool list_lru_memcg_aware(struct list_lru *lru)
{
return lru->memcg_aware;
}
static void list_lru_register(struct list_lru *lru)
{
if (!list_lru_memcg_aware(lru))
return;
mutex_lock(&list_lrus_mutex);
list_add(&lru->list, &list_lrus);
list_add(&lru->list, &memcg_list_lrus);
mutex_unlock(&list_lrus_mutex);
}
static void list_lru_unregister(struct list_lru *lru)
{
if (!list_lru_memcg_aware(lru))
return;
mutex_lock(&list_lrus_mutex);
list_del(&lru->list);
mutex_unlock(&list_lrus_mutex);
@ -37,11 +48,6 @@ static int lru_shrinker_id(struct list_lru *lru)
return lru->shrinker_id;
}
static inline bool list_lru_memcg_aware(struct list_lru *lru)
{
return lru->memcg_aware;
}
static inline struct list_lru_one *
list_lru_from_memcg_idx(struct list_lru_node *nlru, int idx)
{
@ -457,9 +463,6 @@ static int memcg_update_list_lru(struct list_lru *lru,
{
int i;
if (!list_lru_memcg_aware(lru))
return 0;
for_each_node(i) {
if (memcg_update_list_lru_node(&lru->node[i],
old_size, new_size))
@ -482,9 +485,6 @@ static void memcg_cancel_update_list_lru(struct list_lru *lru,
{
int i;
if (!list_lru_memcg_aware(lru))
return;
for_each_node(i)
memcg_cancel_update_list_lru_node(&lru->node[i],
old_size, new_size);
@ -497,7 +497,7 @@ int memcg_update_all_list_lrus(int new_size)
int old_size = memcg_nr_cache_ids;
mutex_lock(&list_lrus_mutex);
list_for_each_entry(lru, &list_lrus, list) {
list_for_each_entry(lru, &memcg_list_lrus, list) {
ret = memcg_update_list_lru(lru, old_size, new_size);
if (ret)
goto fail;
@ -506,7 +506,7 @@ out:
mutex_unlock(&list_lrus_mutex);
return ret;
fail:
list_for_each_entry_continue_reverse(lru, &list_lrus, list)
list_for_each_entry_continue_reverse(lru, &memcg_list_lrus, list)
memcg_cancel_update_list_lru(lru, old_size, new_size);
goto out;
}
@ -543,9 +543,6 @@ static void memcg_drain_list_lru(struct list_lru *lru,
{
int i;
if (!list_lru_memcg_aware(lru))
return;
for_each_node(i)
memcg_drain_list_lru_node(lru, i, src_idx, dst_memcg);
}
@ -555,7 +552,7 @@ void memcg_drain_all_list_lrus(int src_idx, struct mem_cgroup *dst_memcg)
struct list_lru *lru;
mutex_lock(&list_lrus_mutex);
list_for_each_entry(lru, &list_lrus, list)
list_for_each_entry(lru, &memcg_list_lrus, list)
memcg_drain_list_lru(lru, src_idx, dst_memcg);
mutex_unlock(&list_lrus_mutex);
}