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From: Muchun Song <songmuchun@bytedance.com>
To: willy@infradead.org, akpm@linux-foundation.org,
	hannes@cmpxchg.org, mhocko@kernel.org, vdavydov.dev@gmail.com,
	shakeelb@google.com, guro@fb.com, shy828301@gmail.com,
	alexs@kernel.org, richard.weiyang@gmail.com, david@fromorbit.com,
	trond.myklebust@hammerspace.com, anna.schumaker@netapp.com
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, linux-nfs@vger.kernel.org,
	zhengqi.arch@bytedance.com, duanxiongchun@bytedance.com,
	fam.zheng@bytedance.com, Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH v2 16/21] mm: list_lru: rename memcg_drain_all_list_lrus to memcg_reparent_list_lrus
Date: Thu, 27 May 2021 14:21:43 +0800	[thread overview]
Message-ID: <20210527062148.9361-17-songmuchun@bytedance.com> (raw)
In-Reply-To: <20210527062148.9361-1-songmuchun@bytedance.com>

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@bytedance.com>
---
 include/linux/list_lru.h |  3 +--
 mm/list_lru.c            | 25 ++++++++++++-------------
 mm/memcontrol.c          |  4 ++--
 3 files changed, 15 insertions(+), 17 deletions(-)

diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h
index 00c15dc1ede3..60970ea48c29 100644
--- a/include/linux/list_lru.h
+++ b/include/linux/list_lru.h
@@ -76,8 +76,7 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware,
 	__list_lru_init((lru), true, NULL, shrinker)
 
 int memcg_update_all_list_lrus(int num_memcgs);
-void memcg_drain_all_list_lrus(struct mem_cgroup *src_memcg,
-			       struct mem_cgroup *dst_memcg);
+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 43eadb0834e1..dec116a12629 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -462,8 +462,8 @@ 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;
@@ -491,23 +491,22 @@ 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_memcg,
-			       struct mem_cgroup *dst_memcg)
+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_memcg->kmemcg_id;
+	int src_idx = memcg->kmemcg_id;
 
 	/*
 	 * Change kmemcg_id of this cgroup and all its descendants to the
@@ -522,17 +521,17 @@ void memcg_drain_all_list_lrus(struct mem_cgroup *src_memcg,
 	 * memcg_list_lru_free().
 	 */
 	rcu_read_lock();
-	css_for_each_descendant_pre(css, &src_memcg->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_memcg->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, &list_lrus, list)
-		memcg_drain_list_lru(lru, src_idx, dst_memcg);
+		memcg_reparent_list_lru(lru, src_idx, parent);
 	mutex_unlock(&list_lrus_mutex);
 }
 
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 1994513a33d4..205bf710486c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3655,12 +3655,12 @@ 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 @kmemcg_id.
 	 */
 	kmemcg_id = memcg->kmemcg_id;
 
-	memcg_drain_all_list_lrus(memcg, parent);
+	memcg_reparent_list_lrus(memcg, parent);
 
 	memcg_free_cache_id(kmemcg_id);
 }
-- 
2.11.0


  parent reply	other threads:[~2021-05-27  6:26 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-27  6:21 [PATCH v2 00/21] Optimize list lru memory consumption Muchun Song
2021-05-27  6:21 ` [PATCH v2 01/21] mm: list_lru: fix list_lru_count_one() return value Muchun Song
2021-05-27  6:21 ` [PATCH v2 02/21] mm: memcontrol: remove kmemcg_id reparenting Muchun Song
2021-05-27  6:21 ` [PATCH v2 03/21] mm: memcontrol: remove the kmem states Muchun Song
2021-05-27  6:21 ` [PATCH v2 04/21] mm: memcontrol: do it in mem_cgroup_css_online to make the kmem online Muchun Song
2021-05-27  6:21 ` [PATCH v2 05/21] mm: list_lru: remove lru node locking from memcg_update_list_lru_node Muchun Song
2021-05-27  6:21 ` [PATCH v2 06/21] mm: list_lru: only add the memcg aware lrus to the list_lrus Muchun Song
2021-05-27  6:21 ` [PATCH v2 07/21] mm: list_lru: optimize the array of per memcg lists memory consumption Muchun Song
2021-05-27  6:21 ` [PATCH v2 08/21] mm: list_lru: remove memcg_aware field from struct list_lru Muchun Song
2021-05-27  6:21 ` [PATCH v2 09/21] mm: introduce kmem_cache_alloc_lru Muchun Song
2021-05-27  6:21 ` [PATCH v2 10/21] fs: introduce alloc_inode_sb() to allocate filesystems specific inode Muchun Song
2021-05-27  6:21 ` [PATCH v2 11/21] mm: dcache: use kmem_cache_alloc_lru() to allocate dentry Muchun Song
2021-05-27  6:21 ` [PATCH v2 12/21] xarray: use kmem_cache_alloc_lru to allocate xa_node Muchun Song
2021-05-27  6:21 ` [PATCH v2 13/21] mm: workingset: use xas_set_lru() to pass shadow_nodes Muchun Song
2021-05-27  6:21 ` [PATCH v2 14/21] nfs42: use a specific kmem_cache to allocate nfs4_xattr_entry Muchun Song
2021-05-27  6:21 ` [PATCH v2 15/21] mm: list_lru: allocate list_lru_one only when needed Muchun Song
2021-05-27  6:21 ` Muchun Song [this message]
2021-05-27  6:21 ` [PATCH v2 17/21] mm: list_lru: replace linear array with xarray Muchun Song
2021-05-27 12:07   ` Matthew Wilcox
2021-05-28  3:43     ` [External] " Muchun Song
2021-05-28  3:43       ` Muchun Song
2021-05-28  8:04       ` Muchun Song
2021-05-28  8:04         ` Muchun Song
2021-05-27  6:21 ` [PATCH v2 18/21] mm: memcontrol: reuse memory cgroup ID for kmem ID Muchun Song
2021-05-27  6:21 ` [PATCH v2 19/21] mm: memcontrol: fix cannot alloc the maximum memcg ID Muchun Song
2021-05-27  6:21 ` [PATCH v2 20/21] mm: list_lru: rename list_lru_per_memcg to list_lru_memcg Muchun Song
2021-05-27  6:21 ` [PATCH v2 21/21] mm: memcontrol: rename memcg_cache_id to memcg_kmem_id Muchun Song
2021-06-16 10:53 ` [PATCH v2 00/21] Optimize list lru memory consumption Muchun Song
2021-06-16 10:53   ` Muchun Song

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