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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 08/17] From: Kirill Tkhai <ktkhai@virtuozzo.com>
Date: Mon, 09 Jul 2018 11:38:42 +0300
Message-ID: <153112552271.4097.14161701828315972494.stgit@localhost.localdomain> (raw)
In-Reply-To: <153112469064.4097.2581798353485457328.stgit@localhost.localdomain>

fs: Propagate shrinker::id to list_lru

The patch adds list_lru::shrinker_id field, and populates
it by registered shrinker id.

This will be used to set correct bit in memcg shrinkers
map by lru code in next patches, after there appeared
the first related to memcg element in list_lru.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Tested-by: Shakeel Butt <shakeelb@google.com>
---
 fs/super.c               |    4 ++--
 include/linux/list_lru.h |   14 +++++++++-----
 mm/list_lru.c            |   11 ++++++++++-
 mm/workingset.c          |    3 ++-
 4 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/fs/super.c b/fs/super.c
index 78227c4ddb21..f5f96e52e0cd 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -261,9 +261,9 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags,
 	s->s_shrink.flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE;
 	if (prealloc_shrinker(&s->s_shrink))
 		goto fail;
-	if (list_lru_init_memcg(&s->s_dentry_lru))
+	if (list_lru_init_memcg(&s->s_dentry_lru, &s->s_shrink))
 		goto fail;
-	if (list_lru_init_memcg(&s->s_inode_lru))
+	if (list_lru_init_memcg(&s->s_inode_lru, &s->s_shrink))
 		goto fail;
 	return s;
 
diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h
index 2d23b5b745be..9e75bb33766b 100644
--- a/include/linux/list_lru.h
+++ b/include/linux/list_lru.h
@@ -53,16 +53,20 @@ struct list_lru {
 	struct list_lru_node	*node;
 #ifdef CONFIG_MEMCG_KMEM
 	struct list_head	list;
+	int			shrinker_id;
 #endif
 };
 
 void list_lru_destroy(struct list_lru *lru);
 int __list_lru_init(struct list_lru *lru, bool memcg_aware,
-		    struct lock_class_key *key);
-
-#define list_lru_init(lru)		__list_lru_init((lru), false, NULL)
-#define list_lru_init_key(lru, key)	__list_lru_init((lru), false, (key))
-#define list_lru_init_memcg(lru)	__list_lru_init((lru), true, NULL)
+		    struct lock_class_key *key, struct shrinker *shrinker);
+
+#define list_lru_init(lru)				\
+	__list_lru_init((lru), false, NULL, NULL)
+#define list_lru_init_key(lru, key)			\
+	__list_lru_init((lru), false, (key), NULL)
+#define list_lru_init_memcg(lru, shrinker)		\
+	__list_lru_init((lru), true, NULL, shrinker)
 
 int memcg_update_all_list_lrus(int num_memcgs);
 void memcg_drain_all_list_lrus(int src_idx, int dst_idx);
diff --git a/mm/list_lru.c b/mm/list_lru.c
index c5217d84c6e1..5aebbb9b2f5b 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -546,12 +546,18 @@ static void memcg_destroy_list_lru(struct list_lru *lru)
 #endif /* CONFIG_MEMCG_KMEM */
 
 int __list_lru_init(struct list_lru *lru, bool memcg_aware,
-		    struct lock_class_key *key)
+		    struct lock_class_key *key, struct shrinker *shrinker)
 {
 	int i;
 	size_t size = sizeof(*lru->node) * nr_node_ids;
 	int err = -ENOMEM;
 
+#ifdef CONFIG_MEMCG_KMEM
+	if (shrinker)
+		lru->shrinker_id = shrinker->id;
+	else
+		lru->shrinker_id = -1;
+#endif
 	memcg_get_cache_ids();
 
 	lru->node = kzalloc(size, GFP_KERNEL);
@@ -594,6 +600,9 @@ void list_lru_destroy(struct list_lru *lru)
 	kfree(lru->node);
 	lru->node = NULL;
 
+#ifdef CONFIG_MEMCG_KMEM
+	lru->shrinker_id = -1;
+#endif
 	memcg_put_cache_ids();
 }
 EXPORT_SYMBOL_GPL(list_lru_destroy);
diff --git a/mm/workingset.c b/mm/workingset.c
index 4e0b2523aae2..cd0b2ae615e4 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -526,7 +526,8 @@ static int __init workingset_init(void)
 	ret = prealloc_shrinker(&workingset_shadow_shrinker);
 	if (ret)
 		goto err;
-	ret = __list_lru_init(&shadow_nodes, true, &shadow_nodes_key);
+	ret = __list_lru_init(&shadow_nodes, true, &shadow_nodes_key,
+			      &workingset_shadow_shrinker);
 	if (ret)
 		goto err_list_lru;
 	register_shrinker_prepared(&workingset_shadow_shrinker);


  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 ` Kirill Tkhai [this message]
2018-07-09  8:38 ` [PATCH v9 09/17] list_lru: Add memcg argument to list_lru_from_kmem() Kirill Tkhai
2018-07-09  8:39 ` [PATCH v9 10/17] From: Kirill Tkhai <ktkhai@virtuozzo.com> 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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