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mm: list_lru: rename memcg_drain_all_list_lrus to memcg_reparent_list_lrus 

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().

Link: https://lkml.kernel.org/r/20220228122126.37293-12-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Alex Shi <alexs@kernel.org>
Cc: Anna Schumaker <Anna.Schumaker@Netapp.com>
Cc: Chao Yu <chao@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Fam Zheng <fam.zheng@bytedance.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kari Argillander <kari.argillander@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: Yang Shi <shy828301@gmail.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 2022-03-22 14:41:22 -07:00 committed by Linus Torvalds
parent 5abc1e37af
commit 1f391eb270
3 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/list_lru.h
View File

@ -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

24
mm/list_lru.c
View File

@ -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 @@ out:
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);
}

6
mm/memcontrol.c
View File

@ -3710,7 +3710,7 @@ 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;
@ -3719,9 +3719,9 @@ 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);
}