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From: Kirill Tkhai <ktkhai@virtuozzo.com>
To: vdavydov.dev@gmail.com, shakeelb@google.com,
	viro@zeniv.linux.org.uk, hannes@cmpxchg.org, mhocko@kernel.org,
	tglx@linutronix.de, pombredanne@nexb.com,
	stummala@codeaurora.org, gregkh@linuxfoundation.org,
	sfr@canb.auug.org.au, guro@fb.com, mka@chromium.org,
	penguin-kernel@I-love.SAKURA.ne.jp, chris@chris-wilson.co.uk,
	longman@redhat.com, minchan@kernel.org, ying.huang@intel.com,
	mgorman@techsingularity.net, jbacik@fb.com, linux@roeck-us.net,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	willy@infradead.org, lirongqing@baidu.com,
	aryabinin@virtuozzo.com, akpm@linux-foundation.org,
	ktkhai@virtuozzo.com
Subject: [PATCH v9 09/17] list_lru: Add memcg argument to list_lru_from_kmem()
Date: Mon, 09 Jul 2018 11:38:53 +0300
Message-ID: <153112553378.4097.3204989884654871988.stgit@localhost.localdomain> (raw)
In-Reply-To: <153112469064.4097.2581798353485457328.stgit@localhost.localdomain>

This is just refactoring to allow next patches to have
memcg pointer in list_lru_from_kmem().

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Tested-by: Shakeel Butt <shakeelb@google.com>
---
 mm/list_lru.c |   25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/mm/list_lru.c b/mm/list_lru.c
index 5aebbb9b2f5b..1fc5be746e69 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -65,18 +65,24 @@ static __always_inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr)
 }
 
 static inline struct list_lru_one *
-list_lru_from_kmem(struct list_lru_node *nlru, void *ptr)
+list_lru_from_kmem(struct list_lru_node *nlru, void *ptr,
+		   struct mem_cgroup **memcg_ptr)
 {
-	struct mem_cgroup *memcg;
+	struct list_lru_one *l = &nlru->lru;
+	struct mem_cgroup *memcg = NULL;
 
 	if (!nlru->memcg_lrus)
-		return &nlru->lru;
+		goto out;
 
 	memcg = mem_cgroup_from_kmem(ptr);
 	if (!memcg)
-		return &nlru->lru;
+		goto out;
 
-	return list_lru_from_memcg_idx(nlru, memcg_cache_id(memcg));
+	l = list_lru_from_memcg_idx(nlru, memcg_cache_id(memcg));
+out:
+	if (memcg_ptr)
+		*memcg_ptr = memcg;
+	return l;
 }
 #else
 static void list_lru_register(struct list_lru *lru)
@@ -99,8 +105,11 @@ list_lru_from_memcg_idx(struct list_lru_node *nlru, int idx)
 }
 
 static inline struct list_lru_one *
-list_lru_from_kmem(struct list_lru_node *nlru, void *ptr)
+list_lru_from_kmem(struct list_lru_node *nlru, void *ptr,
+		   struct mem_cgroup **memcg_ptr)
 {
+	if (memcg_ptr)
+		*memcg_ptr = NULL;
 	return &nlru->lru;
 }
 #endif /* CONFIG_MEMCG_KMEM */
@@ -113,7 +122,7 @@ bool list_lru_add(struct list_lru *lru, struct list_head *item)
 
 	spin_lock(&nlru->lock);
 	if (list_empty(item)) {
-		l = list_lru_from_kmem(nlru, item);
+		l = list_lru_from_kmem(nlru, item, NULL);
 		list_add_tail(item, &l->list);
 		l->nr_items++;
 		nlru->nr_items++;
@@ -133,7 +142,7 @@ bool list_lru_del(struct list_lru *lru, struct list_head *item)
 
 	spin_lock(&nlru->lock);
 	if (!list_empty(item)) {
-		l = list_lru_from_kmem(nlru, item);
+		l = list_lru_from_kmem(nlru, item, NULL);
 		list_del_init(item);
 		l->nr_items--;
 		nlru->nr_items--;


  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-09  8:37 [PATCH v9 00/17] Improve shrink_slab() scalability (old complexity was O(n^2), new is O(n)) Kirill Tkhai
2018-07-09  8:37 ` [PATCH v9 01/17] list_lru: Combine code under the same define Kirill Tkhai
2018-07-09  8:37 ` [PATCH v9 02/17] mm: Introduce CONFIG_MEMCG_KMEM as combination of CONFIG_MEMCG && !CONFIG_SLOB Kirill Tkhai
2018-07-09  8:37 ` [PATCH v9 03/17] mm: Assign id to every memcg-aware shrinker Kirill Tkhai
2018-07-09  8:37 ` [PATCH v9 04/17] memcg: Move up for_each_mem_cgroup{, _tree} defines Kirill Tkhai
2018-07-09  8:38 ` [PATCH v9 05/17] mm: Assign memcg-aware shrinkers bitmap to memcg Kirill Tkhai
2018-07-09  8:38 ` [PATCH v9 06/17] mm: Refactoring in workingset_init() Kirill Tkhai
2018-07-09  8:38 ` [PATCH v9 07/17] fs: Refactoring in alloc_super() Kirill Tkhai
2018-07-09  8:38 ` [PATCH v9 08/17] From: Kirill Tkhai <ktkhai@virtuozzo.com> Kirill Tkhai
2018-07-09  8:38 ` Kirill Tkhai [this message]
2018-07-09  8:39 ` [PATCH v9 10/17] " Kirill Tkhai
2018-07-09  8:39 ` [PATCH v9 11/17] list_lru: Pass lru argument to memcg_drain_list_lru_node() Kirill Tkhai
2018-07-09  8:39 ` [PATCH v9 12/17] mm: Export mem_cgroup_is_root() Kirill Tkhai
2018-07-09  8:39 ` [PATCH v9 13/17] mm: Set bit in memcg shrinker bitmap on first list_lru item apearance Kirill Tkhai
2018-07-09  8:39 ` [PATCH v9 14/17] mm: Iterate only over charged shrinkers during memcg shrink_slab() Kirill Tkhai
2018-07-09  8:39 ` [PATCH v9 15/17] mm: Generalize shrink_slab() calls in shrink_node() Kirill Tkhai
2018-07-09  8:40 ` [PATCH v9 16/17] From: Kirill Tkhai <ktkhai@virtuozzo.com> Kirill Tkhai
2018-07-09  8:40 ` [PATCH v9 17/17] mm: Clear shrinker bit if there are no objects related to memcg Kirill Tkhai
2018-07-09  8:43 ` [PATCH v9 00/17] Improve shrink_slab() scalability (old complexity was O(n^2), new is O(n)) Kirill Tkhai

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