From patchwork Mon Dec 20 08:56:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687383 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AF4EC433EF for ; Mon, 20 Dec 2021 08:57:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238127AbhLTI51 (ORCPT ); Mon, 20 Dec 2021 03:57:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37184 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234657AbhLTI50 (ORCPT ); Mon, 20 Dec 2021 03:57:26 -0500 Received: from mail-pj1-x1031.google.com (mail-pj1-x1031.google.com [IPv6:2607:f8b0:4864:20::1031]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72177C06173E for ; Mon, 20 Dec 2021 00:57:26 -0800 (PST) Received: by mail-pj1-x1031.google.com with SMTP id z9-20020a17090a7b8900b001b13558eadaso10538323pjc.4 for ; Mon, 20 Dec 2021 00:57:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=6mHyxxbYfE2+o1ufZ7QFipIvmgXe2nhnylRDj6UM0dc=; b=M8GQLnO+WB3nK8CPHPkDsfAHGtzKdarPstnMnDHGZ/k3NEAY2aoDvS79zSIZvFx6eL rRLUE0T6lW5LXQlQHEezG/c8iFbHaq9sx4+nlhuumbSEuhX28EKFTdYu7urHtif5xJ3k Z81rfjXwtbvprzZQLM6XTtASIqk8tDAu2qs2Au+w5Vq+ecbgmvQpaUiKdzxMPaqWnrdN yOkgB1vNoAUZT/qYLYmHuFPL1j9FUszmlhUWKUTWTRZCjFN+jRnk81qcmlKOa/biKyyU YEcaBKndMaM4UcM9TnlehzPWoSK79fwzsXaq4SGxobAKkm88I2RJWduzpIa+5GN+b4qy yiOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=6mHyxxbYfE2+o1ufZ7QFipIvmgXe2nhnylRDj6UM0dc=; b=T25ETz+habVEN8HoQZHhTg9ZDkB6kkgEzFYp/sF7hwV9aFfVjG/FhlYl6cLwQB/Ger ircYZaBtAhVUnj2+H/7vqRQlp1fIHrIKJ2oKxuWnErW2WBojieN3hfipfoT7upDs057t YTVxuMSR1Duoa4iYFnB7H+Kn+uOdlI50z9UsDQuvdWADJegAqFdDE1n8xLlhG2vOCUCB VbIZjFvLiljl0caai1I64JkJNU4xJO0aAN84PA8PiPp26rO4edHNaW6Foh7qJMl50ZMv s2qIq+L9YVoawkdsj2lPKpd5fWiBDDag42Kh/ZepUR1vViwo+T6KSGMhQnGsTo1wO+H1 9tng== X-Gm-Message-State: AOAM532IHhuCp48mYGRuaeQOtanUEEv26fvz+GKwIjWtLrdoUSOfpsIz zewozqCBUYmQjRU/g8WdWEXkIw== X-Google-Smtp-Source: ABdhPJwMdvytvnoJebWU8mOSvPzxT19A0uy4NAOREQ4wM8zVOQCemszBNz2mPu48aX0Xq3jK2UPOFw== X-Received: by 2002:a17:90b:1a86:: with SMTP id ng6mr968781pjb.246.1639990645977; Mon, 20 Dec 2021 00:57:25 -0800 (PST) Received: from localhost.localdomain ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id m11sm18441647pfk.27.2021.12.20.00.57.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Dec 2021 00:57:25 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 01/16] mm: list_lru: optimize memory consumption of arrays of per cgroup lists Date: Mon, 20 Dec 2021 16:56:34 +0800 Message-Id: <20211220085649.8196-2-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The list_lru uses an array (list_lru_memcg->lru) to store pointers which point to the list_lru_one. And the array is per memcg per node. Therefore, the size of the arrays will be 10K * number_of_node * 8 ( a pointer size on 64 bits system) when we run 10k containers in the system. The memory consumption of the arrays becomes significant. The more numa node, the more memory it consumes. I have done a simple test, which creates 10K memcg and mount point each in a two-node system. The memory consumption of the list_lru will be 24464MB. After converting the array from per memcg per node to per memcg, the memory consumption is going to be 21957MB. It is reduces by 2.5GB. In our AMD servers with 8 numa nodes in those sysuem, the memory consumption could be more significant. The savings come from the list_lru_one heads, that it also simplifies the alloc/dealloc path. The new scheme looks like the following. +----------+ mlrus +----------------+ mlru +----------------------+ | list_lru +---------->| list_lru_memcg +--------->| list_lru_per_memcg | +----------+ +----------------+ +----------------------+ | list_lru_per_memcg | +----------------------+ | ... | +--------------+ node +----------------------+ | list_lru_one |<----------+ list_lru_per_memcg | +--------------+ +----------------------+ | list_lru_one | +--------------+ | ... | +--------------+ | list_lru_one | +--------------+ Signed-off-by: Muchun Song Acked-by: Johannes Weiner --- include/linux/list_lru.h | 17 ++-- mm/list_lru.c | 206 +++++++++++++++++------------------------------ 2 files changed, 86 insertions(+), 137 deletions(-) diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h index 1b5fceb565df..729a27b6ff53 100644 --- a/include/linux/list_lru.h +++ b/include/linux/list_lru.h @@ -31,10 +31,15 @@ struct list_lru_one { long nr_items; }; +struct list_lru_per_memcg { + /* array of per cgroup per node lists, indexed by node id */ + struct list_lru_one node[0]; +}; + struct list_lru_memcg { - struct rcu_head rcu; + struct rcu_head rcu; /* array of per cgroup lists, indexed by memcg_cache_id */ - struct list_lru_one *lru[]; + struct list_lru_per_memcg *mlru[]; }; struct list_lru_node { @@ -42,11 +47,7 @@ struct list_lru_node { spinlock_t lock; /* global list, used for the root cgroup in cgroup aware lrus */ struct list_lru_one lru; -#ifdef CONFIG_MEMCG_KMEM - /* for cgroup aware lrus points to per cgroup lists, otherwise NULL */ - struct list_lru_memcg __rcu *memcg_lrus; -#endif - long nr_items; + long nr_items; } ____cacheline_aligned_in_smp; struct list_lru { @@ -55,6 +56,8 @@ struct list_lru { struct list_head list; int shrinker_id; bool memcg_aware; + /* for cgroup aware lrus points to per cgroup lists, otherwise NULL */ + struct list_lru_memcg __rcu *mlrus; #endif }; diff --git a/mm/list_lru.c b/mm/list_lru.c index 0cd5e89ca063..7d1356241aa8 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -49,35 +49,37 @@ static int lru_shrinker_id(struct list_lru *lru) } static inline struct list_lru_one * -list_lru_from_memcg_idx(struct list_lru_node *nlru, int idx) +list_lru_from_memcg_idx(struct list_lru *lru, int nid, int idx) { - struct list_lru_memcg *memcg_lrus; + struct list_lru_memcg *mlrus; + struct list_lru_node *nlru = &lru->node[nid]; + /* * Either lock or RCU protects the array of per cgroup lists - * from relocation (see memcg_update_list_lru_node). + * from relocation (see memcg_update_list_lru). */ - memcg_lrus = rcu_dereference_check(nlru->memcg_lrus, - lockdep_is_held(&nlru->lock)); - if (memcg_lrus && idx >= 0) - return memcg_lrus->lru[idx]; + mlrus = rcu_dereference_check(lru->mlrus, lockdep_is_held(&nlru->lock)); + if (mlrus && idx >= 0) + return &mlrus->mlru[idx]->node[nid]; return &nlru->lru; } static inline struct list_lru_one * -list_lru_from_kmem(struct list_lru_node *nlru, void *ptr, +list_lru_from_kmem(struct list_lru *lru, int nid, void *ptr, struct mem_cgroup **memcg_ptr) { + struct list_lru_node *nlru = &lru->node[nid]; struct list_lru_one *l = &nlru->lru; struct mem_cgroup *memcg = NULL; - if (!nlru->memcg_lrus) + if (!lru->mlrus) goto out; memcg = mem_cgroup_from_obj(ptr); if (!memcg) goto out; - l = list_lru_from_memcg_idx(nlru, memcg_cache_id(memcg)); + l = list_lru_from_memcg_idx(lru, nid, memcg_cache_id(memcg)); out: if (memcg_ptr) *memcg_ptr = memcg; @@ -103,18 +105,18 @@ static inline bool list_lru_memcg_aware(struct list_lru *lru) } static inline struct list_lru_one * -list_lru_from_memcg_idx(struct list_lru_node *nlru, int idx) +list_lru_from_memcg_idx(struct list_lru *lru, int nid, int idx) { - return &nlru->lru; + return &lru->node[nid].lru; } static inline struct list_lru_one * -list_lru_from_kmem(struct list_lru_node *nlru, void *ptr, +list_lru_from_kmem(struct list_lru *lru, int nid, void *ptr, struct mem_cgroup **memcg_ptr) { if (memcg_ptr) *memcg_ptr = NULL; - return &nlru->lru; + return &lru->node[nid].lru; } #endif /* CONFIG_MEMCG_KMEM */ @@ -127,7 +129,7 @@ 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, &memcg); + l = list_lru_from_kmem(lru, nid, item, &memcg); list_add_tail(item, &l->list); /* Set shrinker bit if the first element was added */ if (!l->nr_items++) @@ -150,7 +152,7 @@ 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, NULL); + l = list_lru_from_kmem(lru, nid, item, NULL); list_del_init(item); l->nr_items--; nlru->nr_items--; @@ -180,12 +182,11 @@ EXPORT_SYMBOL_GPL(list_lru_isolate_move); unsigned long list_lru_count_one(struct list_lru *lru, int nid, struct mem_cgroup *memcg) { - struct list_lru_node *nlru = &lru->node[nid]; struct list_lru_one *l; long count; rcu_read_lock(); - l = list_lru_from_memcg_idx(nlru, memcg_cache_id(memcg)); + l = list_lru_from_memcg_idx(lru, nid, memcg_cache_id(memcg)); count = READ_ONCE(l->nr_items); rcu_read_unlock(); @@ -206,16 +207,16 @@ unsigned long list_lru_count_node(struct list_lru *lru, int nid) EXPORT_SYMBOL_GPL(list_lru_count_node); static unsigned long -__list_lru_walk_one(struct list_lru_node *nlru, int memcg_idx, +__list_lru_walk_one(struct list_lru *lru, int nid, int memcg_idx, list_lru_walk_cb isolate, void *cb_arg, unsigned long *nr_to_walk) { - + struct list_lru_node *nlru = &lru->node[nid]; struct list_lru_one *l; struct list_head *item, *n; unsigned long isolated = 0; - l = list_lru_from_memcg_idx(nlru, memcg_idx); + l = list_lru_from_memcg_idx(lru, nid, memcg_idx); restart: list_for_each_safe(item, n, &l->list) { enum lru_status ret; @@ -272,8 +273,8 @@ list_lru_walk_one(struct list_lru *lru, int nid, struct mem_cgroup *memcg, unsigned long ret; spin_lock(&nlru->lock); - ret = __list_lru_walk_one(nlru, memcg_cache_id(memcg), isolate, cb_arg, - nr_to_walk); + ret = __list_lru_walk_one(lru, nid, memcg_cache_id(memcg), isolate, + cb_arg, nr_to_walk); spin_unlock(&nlru->lock); return ret; } @@ -288,8 +289,8 @@ list_lru_walk_one_irq(struct list_lru *lru, int nid, struct mem_cgroup *memcg, unsigned long ret; spin_lock_irq(&nlru->lock); - ret = __list_lru_walk_one(nlru, memcg_cache_id(memcg), isolate, cb_arg, - nr_to_walk); + ret = __list_lru_walk_one(lru, nid, memcg_cache_id(memcg), isolate, + cb_arg, nr_to_walk); spin_unlock_irq(&nlru->lock); return ret; } @@ -308,7 +309,7 @@ unsigned long list_lru_walk_node(struct list_lru *lru, int nid, struct list_lru_node *nlru = &lru->node[nid]; spin_lock(&nlru->lock); - isolated += __list_lru_walk_one(nlru, memcg_idx, + isolated += __list_lru_walk_one(lru, nid, memcg_idx, isolate, cb_arg, nr_to_walk); spin_unlock(&nlru->lock); @@ -328,166 +329,111 @@ static void init_one_lru(struct list_lru_one *l) } #ifdef CONFIG_MEMCG_KMEM -static void __memcg_destroy_list_lru_node(struct list_lru_memcg *memcg_lrus, - int begin, int end) +static void memcg_destroy_list_lru_range(struct list_lru_memcg *mlrus, + int begin, int end) { int i; for (i = begin; i < end; i++) - kfree(memcg_lrus->lru[i]); + kfree(mlrus->mlru[i]); } -static int __memcg_init_list_lru_node(struct list_lru_memcg *memcg_lrus, - int begin, int end) +static int memcg_init_list_lru_range(struct list_lru_memcg *mlrus, + int begin, int end) { int i; for (i = begin; i < end; i++) { - struct list_lru_one *l; + int nid; + struct list_lru_per_memcg *mlru; - l = kmalloc(sizeof(struct list_lru_one), GFP_KERNEL); - if (!l) + mlru = kmalloc(struct_size(mlru, node, nr_node_ids), GFP_KERNEL); + if (!mlru) goto fail; - init_one_lru(l); - memcg_lrus->lru[i] = l; + for_each_node(nid) + init_one_lru(&mlru->node[nid]); + mlrus->mlru[i] = mlru; } return 0; fail: - __memcg_destroy_list_lru_node(memcg_lrus, begin, i); + memcg_destroy_list_lru_range(mlrus, begin, i); return -ENOMEM; } -static int memcg_init_list_lru_node(struct list_lru_node *nlru) +static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) { - struct list_lru_memcg *memcg_lrus; + struct list_lru_memcg *mlrus; int size = memcg_nr_cache_ids; - memcg_lrus = kvmalloc(struct_size(memcg_lrus, lru, size), GFP_KERNEL); - if (!memcg_lrus) + lru->memcg_aware = memcg_aware; + if (!memcg_aware) + return 0; + + mlrus = kvmalloc(struct_size(mlrus, mlru, size), GFP_KERNEL); + if (!mlrus) return -ENOMEM; - if (__memcg_init_list_lru_node(memcg_lrus, 0, size)) { - kvfree(memcg_lrus); + if (memcg_init_list_lru_range(mlrus, 0, size)) { + kvfree(mlrus); return -ENOMEM; } - RCU_INIT_POINTER(nlru->memcg_lrus, memcg_lrus); + RCU_INIT_POINTER(lru->mlrus, mlrus); return 0; } -static void memcg_destroy_list_lru_node(struct list_lru_node *nlru) +static void memcg_destroy_list_lru(struct list_lru *lru) { - struct list_lru_memcg *memcg_lrus; + struct list_lru_memcg *mlrus; + + if (!list_lru_memcg_aware(lru)) + return; + /* * This is called when shrinker has already been unregistered, * and nobody can use it. So, there is no need to use kvfree_rcu(). */ - memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, true); - __memcg_destroy_list_lru_node(memcg_lrus, 0, memcg_nr_cache_ids); - kvfree(memcg_lrus); + mlrus = rcu_dereference_protected(lru->mlrus, true); + memcg_destroy_list_lru_range(mlrus, 0, memcg_nr_cache_ids); + kvfree(mlrus); } -static int memcg_update_list_lru_node(struct list_lru_node *nlru, - int old_size, int new_size) +static int memcg_update_list_lru(struct list_lru *lru, int old_size, int new_size) { struct list_lru_memcg *old, *new; BUG_ON(old_size > new_size); - old = rcu_dereference_protected(nlru->memcg_lrus, + old = rcu_dereference_protected(lru->mlrus, lockdep_is_held(&list_lrus_mutex)); - new = kvmalloc(struct_size(new, lru, new_size), GFP_KERNEL); + new = kvmalloc(struct_size(new, mlru, new_size), GFP_KERNEL); if (!new) return -ENOMEM; - if (__memcg_init_list_lru_node(new, old_size, new_size)) { + if (memcg_init_list_lru_range(new, old_size, new_size)) { kvfree(new); return -ENOMEM; } - memcpy(&new->lru, &old->lru, flex_array_size(new, lru, old_size)); - rcu_assign_pointer(nlru->memcg_lrus, new); + memcpy(&new->mlru, &old->mlru, flex_array_size(new, mlru, old_size)); + rcu_assign_pointer(lru->mlrus, new); kvfree_rcu(old, rcu); return 0; } -static void memcg_cancel_update_list_lru_node(struct list_lru_node *nlru, - int old_size, int new_size) -{ - struct list_lru_memcg *memcg_lrus; - - memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, - lockdep_is_held(&list_lrus_mutex)); - /* do not bother shrinking the array back to the old size, because we - * cannot handle allocation failures here */ - __memcg_destroy_list_lru_node(memcg_lrus, old_size, new_size); -} - -static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) -{ - int i; - - lru->memcg_aware = memcg_aware; - - if (!memcg_aware) - return 0; - - for_each_node(i) { - if (memcg_init_list_lru_node(&lru->node[i])) - goto fail; - } - return 0; -fail: - for (i = i - 1; i >= 0; i--) { - if (!lru->node[i].memcg_lrus) - continue; - memcg_destroy_list_lru_node(&lru->node[i]); - } - return -ENOMEM; -} - -static void memcg_destroy_list_lru(struct list_lru *lru) -{ - int i; - - if (!list_lru_memcg_aware(lru)) - return; - - for_each_node(i) - memcg_destroy_list_lru_node(&lru->node[i]); -} - -static int memcg_update_list_lru(struct list_lru *lru, - int old_size, int new_size) -{ - int i; - - for_each_node(i) { - if (memcg_update_list_lru_node(&lru->node[i], - old_size, new_size)) - goto fail; - } - return 0; -fail: - for (i = i - 1; i >= 0; i--) { - if (!lru->node[i].memcg_lrus) - continue; - - memcg_cancel_update_list_lru_node(&lru->node[i], - old_size, new_size); - } - return -ENOMEM; -} - static void memcg_cancel_update_list_lru(struct list_lru *lru, int old_size, int new_size) { - int i; + struct list_lru_memcg *mlrus; - for_each_node(i) - memcg_cancel_update_list_lru_node(&lru->node[i], - old_size, new_size); + mlrus = rcu_dereference_protected(lru->mlrus, + lockdep_is_held(&list_lrus_mutex)); + /* + * Do not bother shrinking the array back to the old size, because we + * cannot handle allocation failures here. + */ + memcg_destroy_list_lru_range(mlrus, old_size, new_size); } int memcg_update_all_list_lrus(int new_size) @@ -524,8 +470,8 @@ static void memcg_drain_list_lru_node(struct list_lru *lru, int nid, */ spin_lock_irq(&nlru->lock); - src = list_lru_from_memcg_idx(nlru, src_idx); - dst = list_lru_from_memcg_idx(nlru, dst_idx); + src = list_lru_from_memcg_idx(lru, nid, src_idx); + dst = list_lru_from_memcg_idx(lru, nid, dst_idx); list_splice_init(&src->list, &dst->list); From patchwork Mon Dec 20 08:56:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687385 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20BEEC433EF for ; Mon, 20 Dec 2021 08:57:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238143AbhLTI5j (ORCPT ); Mon, 20 Dec 2021 03:57:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238129AbhLTI5i (ORCPT ); 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Mon, 20 Dec 2021 00:57:37 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 02/16] mm: introduce kmem_cache_alloc_lru Date: Mon, 20 Dec 2021 16:56:35 +0800 Message-Id: <20211220085649.8196-3-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org We currently allocate scope for every memcg to be able to tracked on every superblock instantiated in the system, regardless of whether that superblock is even accessible to that memcg. These huge memcg counts come from container hosts where memcgs are confined to just a small subset of the total number of superblocks that instantiated at any given point in time. For these systems with huge container counts, list_lru does not need the capability of tracking every memcg on every superblock. What it comes down to is that adding the memcg to the list_lru at the first insert. So introduce kmem_cache_alloc_lru to allocate objects and its list_lru. In the later patch, we will convert all inode and dentry allocation from kmem_cache_alloc to kmem_cache_alloc_lru. Signed-off-by: Muchun Song --- include/linux/list_lru.h | 4 ++ include/linux/memcontrol.h | 14 ++++++ include/linux/slab.h | 3 ++ mm/list_lru.c | 104 +++++++++++++++++++++++++++++++++++++++++---- mm/memcontrol.c | 14 ------ mm/slab.c | 39 +++++++++++------ mm/slab.h | 25 +++++++++-- mm/slob.c | 6 +++ mm/slub.c | 42 ++++++++++++------ 9 files changed, 198 insertions(+), 53 deletions(-) diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h index 729a27b6ff53..ab912c49334f 100644 --- a/include/linux/list_lru.h +++ b/include/linux/list_lru.h @@ -56,6 +56,8 @@ struct list_lru { struct list_head list; int shrinker_id; bool memcg_aware; + /* protects ->mlrus->mlru[i] */ + spinlock_t lock; /* for cgroup aware lrus points to per cgroup lists, otherwise NULL */ struct list_lru_memcg __rcu *mlrus; #endif @@ -72,6 +74,8 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, #define list_lru_init_memcg(lru, shrinker) \ __list_lru_init((lru), true, NULL, shrinker) +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(int src_idx, struct mem_cgroup *dst_memcg); diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 0c5c403f4be6..561ba47760db 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -520,6 +520,20 @@ static inline struct mem_cgroup *page_memcg_check(struct page *page) return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); } +static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) +{ + struct mem_cgroup *memcg; + + rcu_read_lock(); +retry: + memcg = obj_cgroup_memcg(objcg); + if (unlikely(!css_tryget(&memcg->css))) + goto retry; + rcu_read_unlock(); + + return memcg; +} + #ifdef CONFIG_MEMCG_KMEM /* * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. diff --git a/include/linux/slab.h b/include/linux/slab.h index 181045148b06..eccbd21d3753 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -135,6 +135,7 @@ #include +struct list_lru; struct mem_cgroup; /* * struct kmem_cache related prototypes @@ -425,6 +426,8 @@ static __always_inline unsigned int __kmalloc_index(size_t size, void *__kmalloc(size_t size, gfp_t flags) __assume_kmalloc_alignment __alloc_size(1); void *kmem_cache_alloc(struct kmem_cache *s, gfp_t flags) __assume_slab_alignment __malloc; +void *kmem_cache_alloc_lru(struct kmem_cache *s, struct list_lru *lru, + gfp_t gfpflags) __assume_slab_alignment __malloc; void kmem_cache_free(struct kmem_cache *s, void *objp); /* diff --git a/mm/list_lru.c b/mm/list_lru.c index 7d1356241aa8..bffa80527723 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -13,6 +13,7 @@ #include #include #include "slab.h" +#include "internal.h" #ifdef CONFIG_MEMCG_KMEM static LIST_HEAD(memcg_list_lrus); @@ -338,22 +339,30 @@ static void memcg_destroy_list_lru_range(struct list_lru_memcg *mlrus, kfree(mlrus->mlru[i]); } +static struct list_lru_per_memcg *memcg_init_list_lru_one(gfp_t gfp) +{ + int nid; + struct list_lru_per_memcg *mlru; + + mlru = kmalloc(struct_size(mlru, node, nr_node_ids), gfp); + if (!mlru) + return NULL; + + for_each_node(nid) + init_one_lru(&mlru->node[nid]); + + return mlru; +} + static int memcg_init_list_lru_range(struct list_lru_memcg *mlrus, int begin, int end) { int i; for (i = begin; i < end; i++) { - int nid; - struct list_lru_per_memcg *mlru; - - mlru = kmalloc(struct_size(mlru, node, nr_node_ids), GFP_KERNEL); - if (!mlru) + mlrus->mlru[i] = memcg_init_list_lru_one(GFP_KERNEL); + if (!mlrus->mlru[i]) goto fail; - - for_each_node(nid) - init_one_lru(&mlru->node[nid]); - mlrus->mlru[i] = mlru; } return 0; fail: @@ -370,6 +379,8 @@ static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) if (!memcg_aware) return 0; + spin_lock_init(&lru->lock); + mlrus = kvmalloc(struct_size(mlrus, mlru, size), GFP_KERNEL); if (!mlrus) return -ENOMEM; @@ -416,8 +427,11 @@ static int memcg_update_list_lru(struct list_lru *lru, int old_size, int new_siz return -ENOMEM; } + spin_lock_irq(&lru->lock); memcpy(&new->mlru, &old->mlru, flex_array_size(new, mlru, old_size)); rcu_assign_pointer(lru->mlrus, new); + spin_unlock_irq(&lru->lock); + kvfree_rcu(old, rcu); return 0; } @@ -502,6 +516,78 @@ void memcg_drain_all_list_lrus(int src_idx, struct mem_cgroup *dst_memcg) memcg_drain_list_lru(lru, src_idx, dst_memcg); mutex_unlock(&list_lrus_mutex); } + +static bool memcg_list_lru_allocated(struct mem_cgroup *memcg, + struct list_lru *lru) +{ + bool allocated; + int idx; + + idx = memcg->kmemcg_id; + if (unlikely(idx < 0)) + return true; + + rcu_read_lock(); + allocated = !!rcu_dereference(lru->mlrus)->mlru[idx]; + rcu_read_unlock(); + + return allocated; +} + +int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, + gfp_t gfp) +{ + int i; + unsigned long flags; + struct list_lru_memcg *mlrus; + struct list_lru_memcg_table { + struct list_lru_per_memcg *mlru; + struct mem_cgroup *memcg; + } *table; + + if (!list_lru_memcg_aware(lru) || memcg_list_lru_allocated(memcg, lru)) + return 0; + + gfp &= GFP_RECLAIM_MASK; + table = kmalloc_array(memcg->css.cgroup->level, sizeof(*table), gfp); + if (!table) + return -ENOMEM; + + /* + * Because the list_lru can be reparented to the parent cgroup's + * list_lru, we should make sure that this cgroup and all its + * ancestors have allocated list_lru_per_memcg. + */ + for (i = 0; memcg; memcg = parent_mem_cgroup(memcg), i++) { + if (memcg_list_lru_allocated(memcg, lru)) + break; + + table[i].memcg = memcg; + table[i].mlru = memcg_init_list_lru_one(gfp); + if (!table[i].mlru) { + while (i--) + kfree(table[i].mlru); + kfree(table); + return -ENOMEM; + } + } + + spin_lock_irqsave(&lru->lock, flags); + mlrus = rcu_dereference_protected(lru->mlrus, true); + while (i--) { + int index = table[i].memcg->kmemcg_id; + + if (mlrus->mlru[index]) + kfree(table[i].mlru); + else + mlrus->mlru[index] = table[i].mlru; + } + spin_unlock_irqrestore(&lru->lock, flags); + + kfree(table); + + return 0; +} #else static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) { diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6863a834ed42..d505b43d5f3b 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2794,20 +2794,6 @@ static void commit_charge(struct folio *folio, struct mem_cgroup *memcg) folio->memcg_data = (unsigned long)memcg; } -static struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) -{ - struct mem_cgroup *memcg; - - rcu_read_lock(); -retry: - memcg = obj_cgroup_memcg(objcg); - if (unlikely(!css_tryget(&memcg->css))) - goto retry; - rcu_read_unlock(); - - return memcg; -} - #ifdef CONFIG_MEMCG_KMEM /* * The allocated objcg pointers array is not accounted directly. diff --git a/mm/slab.c b/mm/slab.c index ca4822f6b2b6..9f9e5593f67e 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3219,7 +3219,7 @@ slab_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, size_t orig_ bool init = false; flags &= gfp_allowed_mask; - cachep = slab_pre_alloc_hook(cachep, &objcg, 1, flags); + cachep = slab_pre_alloc_hook(cachep, NULL, &objcg, 1, flags); if (unlikely(!cachep)) return NULL; @@ -3295,7 +3295,8 @@ __do_cache_alloc(struct kmem_cache *cachep, gfp_t flags) #endif /* CONFIG_NUMA */ static __always_inline void * -slab_alloc(struct kmem_cache *cachep, gfp_t flags, size_t orig_size, unsigned long caller) +slab_alloc(struct kmem_cache *cachep, struct list_lru *lru, gfp_t flags, + size_t orig_size, unsigned long caller) { unsigned long save_flags; void *objp; @@ -3303,7 +3304,7 @@ slab_alloc(struct kmem_cache *cachep, gfp_t flags, size_t orig_size, unsigned lo bool init = false; flags &= gfp_allowed_mask; - cachep = slab_pre_alloc_hook(cachep, &objcg, 1, flags); + cachep = slab_pre_alloc_hook(cachep, lru, &objcg, 1, flags); if (unlikely(!cachep)) return NULL; @@ -3492,6 +3493,18 @@ void ___cache_free(struct kmem_cache *cachep, void *objp, __free_one(ac, objp); } +static __always_inline +void *__kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, + gfp_t flags) +{ + void *ret = slab_alloc(cachep, lru, flags, cachep->object_size, _RET_IP_); + + trace_kmem_cache_alloc(_RET_IP_, ret, + cachep->object_size, cachep->size, flags); + + return ret; +} + /** * kmem_cache_alloc - Allocate an object * @cachep: The cache to allocate from. @@ -3504,15 +3517,17 @@ void ___cache_free(struct kmem_cache *cachep, void *objp, */ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) { - void *ret = slab_alloc(cachep, flags, cachep->object_size, _RET_IP_); - - trace_kmem_cache_alloc(_RET_IP_, ret, - cachep->object_size, cachep->size, flags); - - return ret; + return __kmem_cache_alloc_lru(cachep, NULL, flags); } EXPORT_SYMBOL(kmem_cache_alloc); +void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, + gfp_t flags) +{ + return __kmem_cache_alloc_lru(cachep, lru, flags); +} +EXPORT_SYMBOL(kmem_cache_alloc_lru); + static __always_inline void cache_alloc_debugcheck_after_bulk(struct kmem_cache *s, gfp_t flags, size_t size, void **p, unsigned long caller) @@ -3529,7 +3544,7 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size, size_t i; struct obj_cgroup *objcg = NULL; - s = slab_pre_alloc_hook(s, &objcg, size, flags); + s = slab_pre_alloc_hook(s, NULL, &objcg, size, flags); if (!s) return 0; @@ -3570,7 +3585,7 @@ kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size) { void *ret; - ret = slab_alloc(cachep, flags, size, _RET_IP_); + ret = slab_alloc(cachep, NULL, flags, size, _RET_IP_); ret = kasan_kmalloc(cachep, ret, size, flags); trace_kmalloc(_RET_IP_, ret, @@ -3697,7 +3712,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, cachep = kmalloc_slab(size, flags); if (unlikely(ZERO_OR_NULL_PTR(cachep))) return cachep; - ret = slab_alloc(cachep, flags, size, caller); + ret = slab_alloc(cachep, NULL, flags, size, caller); ret = kasan_kmalloc(cachep, ret, size, flags); trace_kmalloc(caller, ret, diff --git a/mm/slab.h b/mm/slab.h index 56ad7eea3ddf..5768252aad1c 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -46,6 +46,7 @@ struct kmem_cache { #include #include #include +#include /* * State of the slab allocator. @@ -269,6 +270,7 @@ static inline size_t obj_full_size(struct kmem_cache *s) * Returns false if the allocation should fail. */ static inline bool memcg_slab_pre_alloc_hook(struct kmem_cache *s, + struct list_lru *lru, struct obj_cgroup **objcgp, size_t objects, gfp_t flags) { @@ -284,13 +286,26 @@ static inline bool memcg_slab_pre_alloc_hook(struct kmem_cache *s, if (!objcg) return true; - if (obj_cgroup_charge(objcg, flags, objects * obj_full_size(s))) { - obj_cgroup_put(objcg); - return false; + if (lru) { + int ret; + struct mem_cgroup *memcg; + + memcg = get_mem_cgroup_from_objcg(objcg); + ret = memcg_list_lru_alloc(memcg, lru, flags); + css_put(&memcg->css); + + if (ret) + goto out; } + if (obj_cgroup_charge(objcg, flags, objects * obj_full_size(s))) + goto out; + *objcgp = objcg; return true; +out: + obj_cgroup_put(objcg); + return false; } static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s, @@ -386,6 +401,7 @@ static inline void memcg_free_page_obj_cgroups(struct page *page) } static inline bool memcg_slab_pre_alloc_hook(struct kmem_cache *s, + struct list_lru *lru, struct obj_cgroup **objcgp, size_t objects, gfp_t flags) { @@ -484,6 +500,7 @@ static inline size_t slab_ksize(const struct kmem_cache *s) } static inline struct kmem_cache *slab_pre_alloc_hook(struct kmem_cache *s, + struct list_lru *lru, struct obj_cgroup **objcgp, size_t size, gfp_t flags) { @@ -494,7 +511,7 @@ static inline struct kmem_cache *slab_pre_alloc_hook(struct kmem_cache *s, if (should_failslab(s, flags)) return NULL; - if (!memcg_slab_pre_alloc_hook(s, objcgp, size, flags)) + if (!memcg_slab_pre_alloc_hook(s, lru, objcgp, size, flags)) return NULL; return s; diff --git a/mm/slob.c b/mm/slob.c index 03deee1e6a94..fd9d7c24921f 100644 --- a/mm/slob.c +++ b/mm/slob.c @@ -633,6 +633,12 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) } EXPORT_SYMBOL(kmem_cache_alloc); + +void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, gfp_t flags) +{ + return slob_alloc_node(cachep, flags, NUMA_NO_NODE); +} +EXPORT_SYMBOL(kmem_cache_alloc_lru); #ifdef CONFIG_NUMA void *__kmalloc_node(size_t size, gfp_t gfp, int node) { diff --git a/mm/slub.c b/mm/slub.c index a8626825a829..6d9f05d13c0e 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3135,7 +3135,7 @@ static __always_inline void maybe_wipe_obj_freeptr(struct kmem_cache *s, * * Otherwise we can simply pick the next object from the lockless free list. */ -static __always_inline void *slab_alloc_node(struct kmem_cache *s, +static __always_inline void *slab_alloc_node(struct kmem_cache *s, struct list_lru *lru, gfp_t gfpflags, int node, unsigned long addr, size_t orig_size) { void *object; @@ -3145,7 +3145,7 @@ static __always_inline void *slab_alloc_node(struct kmem_cache *s, struct obj_cgroup *objcg = NULL; bool init = false; - s = slab_pre_alloc_hook(s, &objcg, 1, gfpflags); + s = slab_pre_alloc_hook(s, lru, &objcg, 1, gfpflags); if (!s) return NULL; @@ -3236,27 +3236,41 @@ static __always_inline void *slab_alloc_node(struct kmem_cache *s, return object; } -static __always_inline void *slab_alloc(struct kmem_cache *s, +static __always_inline void *slab_alloc(struct kmem_cache *s, struct list_lru *lru, gfp_t gfpflags, unsigned long addr, size_t orig_size) { - return slab_alloc_node(s, gfpflags, NUMA_NO_NODE, addr, orig_size); + return slab_alloc_node(s, lru, gfpflags, NUMA_NO_NODE, addr, orig_size); } -void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags) +static __always_inline +void *__kmem_cache_alloc_lru(struct kmem_cache *s, struct list_lru *lru, + gfp_t gfpflags) { - void *ret = slab_alloc(s, gfpflags, _RET_IP_, s->object_size); + void *ret = slab_alloc(s, lru, gfpflags, _RET_IP_, s->object_size); trace_kmem_cache_alloc(_RET_IP_, ret, s->object_size, s->size, gfpflags); return ret; } + +void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags) +{ + return __kmem_cache_alloc_lru(s, NULL, gfpflags); +} EXPORT_SYMBOL(kmem_cache_alloc); +void *kmem_cache_alloc_lru(struct kmem_cache *s, struct list_lru *lru, + gfp_t gfpflags) +{ + return __kmem_cache_alloc_lru(s, lru, gfpflags); +} +EXPORT_SYMBOL(kmem_cache_alloc_lru); + #ifdef CONFIG_TRACING void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size) { - void *ret = slab_alloc(s, gfpflags, _RET_IP_, size); + void *ret = slab_alloc(s, NULL, gfpflags, _RET_IP_, size); trace_kmalloc(_RET_IP_, ret, size, s->size, gfpflags); ret = kasan_kmalloc(s, ret, size, gfpflags); return ret; @@ -3267,7 +3281,7 @@ EXPORT_SYMBOL(kmem_cache_alloc_trace); #ifdef CONFIG_NUMA void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node) { - void *ret = slab_alloc_node(s, gfpflags, node, _RET_IP_, s->object_size); + void *ret = slab_alloc_node(s, NULL, gfpflags, node, _RET_IP_, s->object_size); trace_kmem_cache_alloc_node(_RET_IP_, ret, s->object_size, s->size, gfpflags, node); @@ -3281,7 +3295,7 @@ void *kmem_cache_alloc_node_trace(struct kmem_cache *s, gfp_t gfpflags, int node, size_t size) { - void *ret = slab_alloc_node(s, gfpflags, node, _RET_IP_, size); + void *ret = slab_alloc_node(s, NULL, gfpflags, node, _RET_IP_, size); trace_kmalloc_node(_RET_IP_, ret, size, s->size, gfpflags, node); @@ -3667,7 +3681,7 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size, struct obj_cgroup *objcg = NULL; /* memcg and kmem_cache debug support */ - s = slab_pre_alloc_hook(s, &objcg, size, flags); + s = slab_pre_alloc_hook(s, NULL, &objcg, size, flags); if (unlikely(!s)) return false; /* @@ -4416,7 +4430,7 @@ void *__kmalloc(size_t size, gfp_t flags) if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc(s, flags, _RET_IP_, size); + ret = slab_alloc(s, NULL, flags, _RET_IP_, size); trace_kmalloc(_RET_IP_, ret, size, s->size, flags); @@ -4464,7 +4478,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node) if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc_node(s, flags, node, _RET_IP_, size); + ret = slab_alloc_node(s, NULL, flags, node, _RET_IP_, size); trace_kmalloc_node(_RET_IP_, ret, size, s->size, flags, node); @@ -4922,7 +4936,7 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller) if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc(s, gfpflags, caller, size); + ret = slab_alloc(s, NULL, gfpflags, caller, size); /* Honor the call site pointer we received. */ trace_kmalloc(caller, ret, size, s->size, gfpflags); @@ -4953,7 +4967,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags, if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc_node(s, gfpflags, node, caller, size); + ret = slab_alloc_node(s, NULL, gfpflags, node, caller, size); /* Honor the call site pointer we received. */ trace_kmalloc_node(caller, ret, size, s->size, gfpflags, node); From patchwork Mon Dec 20 08:56:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687387 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3F19C433EF for ; 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Mon, 20 Dec 2021 00:57:48 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 03/16] fs: introduce alloc_inode_sb() to allocate filesystems specific inode Date: Mon, 20 Dec 2021 16:56:36 +0800 Message-Id: <20211220085649.8196-4-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The allocated inode cache is supposed to be added to its memcg list_lru which should be allocated as well in advance. That can be done by kmem_cache_alloc_lru() which allocates object and list_lru. The file systems is main user of it. So introduce alloc_inode_sb() to allocate file system specific inodes and set up the inode reclaim context properly. The file system is supposed to use alloc_inode_sb() to allocate inodes. In the later patches, we will convert all users to the new API. Signed-off-by: Muchun Song Reviewed-by: Roman Gushchin --- Documentation/filesystems/porting.rst | 5 +++++ fs/inode.c | 2 +- include/linux/fs.h | 11 +++++++++++ 3 files changed, 17 insertions(+), 1 deletion(-) diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index bf19fd6b86e7..c9c157d7b7bb 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -45,6 +45,11 @@ typically between calling iget_locked() and unlocking the inode. At some point that will become mandatory. +**mandatory** + +The foo_inode_info should always be allocated through alloc_inode_sb() rather +than kmem_cache_alloc() or kmalloc() related. + --- **mandatory** diff --git a/fs/inode.c b/fs/inode.c index 6b80a51129d5..dcb1e6cad201 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -234,7 +234,7 @@ static struct inode *alloc_inode(struct super_block *sb) if (ops->alloc_inode) inode = ops->alloc_inode(sb); else - inode = kmem_cache_alloc(inode_cachep, GFP_KERNEL); + inode = alloc_inode_sb(sb, inode_cachep, GFP_KERNEL); if (!inode) return NULL; diff --git a/include/linux/fs.h b/include/linux/fs.h index bbf812ce89a8..4592f00ec5e7 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -41,6 +41,7 @@ #include #include #include +#include #include #include @@ -3178,6 +3179,16 @@ extern void free_inode_nonrcu(struct inode *inode); extern int should_remove_suid(struct dentry *); extern int file_remove_privs(struct file *); +/* + * This must be used for allocating filesystems specific inodes to set + * up the inode reclaim context correctly. + */ +static inline void * +alloc_inode_sb(struct super_block *sb, struct kmem_cache *cache, gfp_t gfp) +{ + return kmem_cache_alloc_lru(cache, &sb->s_inode_lru, gfp); +} + extern void __insert_inode_hash(struct inode *, unsigned long hashval); static inline void insert_inode_hash(struct inode *inode) { From patchwork Mon Dec 20 08:56:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687389 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 50FEDC433FE for ; Mon, 20 Dec 2021 08:58:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229623AbhLTI6C (ORCPT ); Mon, 20 Dec 2021 03:58:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37336 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234367AbhLTI6B (ORCPT ); Mon, 20 Dec 2021 03:58:01 -0500 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B060CC06173E for ; 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Signed-off-by: Muchun Song Acked-by: Theodore Ts'o [ext4] Acked-by: Roman Gushchin --- block/bdev.c | 2 +- drivers/dax/super.c | 2 +- fs/9p/vfs_inode.c | 2 +- fs/adfs/super.c | 2 +- fs/affs/super.c | 2 +- fs/afs/super.c | 2 +- fs/befs/linuxvfs.c | 2 +- fs/bfs/inode.c | 2 +- fs/btrfs/inode.c | 2 +- fs/ceph/inode.c | 2 +- fs/cifs/cifsfs.c | 2 +- fs/coda/inode.c | 2 +- fs/ecryptfs/super.c | 2 +- fs/efs/super.c | 2 +- fs/erofs/super.c | 2 +- fs/exfat/super.c | 2 +- fs/ext2/super.c | 2 +- fs/ext4/super.c | 2 +- fs/fat/inode.c | 2 +- fs/freevxfs/vxfs_super.c | 2 +- fs/fuse/inode.c | 2 +- fs/gfs2/super.c | 2 +- fs/hfs/super.c | 2 +- fs/hfsplus/super.c | 2 +- fs/hostfs/hostfs_kern.c | 2 +- fs/hpfs/super.c | 2 +- fs/hugetlbfs/inode.c | 2 +- fs/isofs/inode.c | 2 +- fs/jffs2/super.c | 2 +- fs/jfs/super.c | 2 +- fs/minix/inode.c | 2 +- fs/nfs/inode.c | 2 +- fs/nilfs2/super.c | 2 +- fs/ntfs/inode.c | 2 +- fs/ntfs3/super.c | 2 +- fs/ocfs2/dlmfs/dlmfs.c | 2 +- fs/ocfs2/super.c | 2 +- fs/openpromfs/inode.c | 2 +- fs/orangefs/super.c | 2 +- fs/overlayfs/super.c | 2 +- fs/proc/inode.c | 2 +- fs/qnx4/inode.c | 2 +- fs/qnx6/inode.c | 2 +- fs/reiserfs/super.c | 2 +- fs/romfs/super.c | 2 +- fs/squashfs/super.c | 2 +- fs/sysv/inode.c | 2 +- fs/ubifs/super.c | 2 +- fs/udf/super.c | 2 +- fs/ufs/super.c | 2 +- fs/vboxsf/super.c | 2 +- fs/xfs/xfs_icache.c | 2 +- fs/zonefs/super.c | 2 +- ipc/mqueue.c | 2 +- mm/shmem.c | 2 +- net/socket.c | 2 +- net/sunrpc/rpc_pipe.c | 2 +- 57 files changed, 57 insertions(+), 57 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index b1d087e5e205..32c42b47c0e9 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -390,7 +390,7 @@ static struct kmem_cache * bdev_cachep __read_mostly; static struct inode *bdev_alloc_inode(struct super_block *sb) { - struct bdev_inode *ei = kmem_cache_alloc(bdev_cachep, GFP_KERNEL); + struct bdev_inode *ei = alloc_inode_sb(sb, bdev_cachep, GFP_KERNEL); if (!ei) return NULL; diff --git a/drivers/dax/super.c b/drivers/dax/super.c index b882cf8106ea..15275c438a4e 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -383,7 +383,7 @@ static struct inode *dax_alloc_inode(struct super_block *sb) struct dax_device *dax_dev; struct inode *inode; - dax_dev = kmem_cache_alloc(dax_cache, GFP_KERNEL); + dax_dev = alloc_inode_sb(sb, dax_cache, GFP_KERNEL); if (!dax_dev) return NULL; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 328c338ff304..1c5d8c56d94f 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -228,7 +228,7 @@ struct inode *v9fs_alloc_inode(struct super_block *sb) { struct v9fs_inode *v9inode; - v9inode = kmem_cache_alloc(v9fs_inode_cache, GFP_KERNEL); + v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); if (!v9inode) return NULL; #ifdef CONFIG_9P_FSCACHE diff --git a/fs/adfs/super.c b/fs/adfs/super.c index bdbd26e571ed..e8bfc38239cd 100644 --- a/fs/adfs/super.c +++ b/fs/adfs/super.c @@ -220,7 +220,7 @@ static struct kmem_cache *adfs_inode_cachep; static struct inode *adfs_alloc_inode(struct super_block *sb) { struct adfs_inode_info *ei; - ei = kmem_cache_alloc(adfs_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, adfs_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/fs/affs/super.c b/fs/affs/super.c index c609005a9eaa..4c5f30a83336 100644 --- a/fs/affs/super.c +++ b/fs/affs/super.c @@ -100,7 +100,7 @@ static struct inode *affs_alloc_inode(struct super_block *sb) { struct affs_inode_info *i; - i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL); + i = alloc_inode_sb(sb, affs_inode_cachep, GFP_KERNEL); if (!i) return NULL; diff --git a/fs/afs/super.c b/fs/afs/super.c index d110def8aa8e..92cb145e1c65 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -677,7 +677,7 @@ static struct inode *afs_alloc_inode(struct super_block *sb) { struct afs_vnode *vnode; - vnode = kmem_cache_alloc(afs_inode_cachep, GFP_KERNEL); + vnode = alloc_inode_sb(sb, afs_inode_cachep, GFP_KERNEL); if (!vnode) return NULL; diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c index c1ba13d19024..b4b3567ac655 100644 --- a/fs/befs/linuxvfs.c +++ b/fs/befs/linuxvfs.c @@ -277,7 +277,7 @@ befs_alloc_inode(struct super_block *sb) { struct befs_inode_info *bi; - bi = kmem_cache_alloc(befs_inode_cachep, GFP_KERNEL); + bi = alloc_inode_sb(sb, befs_inode_cachep, GFP_KERNEL); if (!bi) return NULL; return &bi->vfs_inode; diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c index fd691e4815c5..1926bec2c850 100644 --- a/fs/bfs/inode.c +++ b/fs/bfs/inode.c @@ -239,7 +239,7 @@ static struct kmem_cache *bfs_inode_cachep; static struct inode *bfs_alloc_inode(struct super_block *sb) { struct bfs_inode_info *bi; - bi = kmem_cache_alloc(bfs_inode_cachep, GFP_KERNEL); + bi = alloc_inode_sb(sb, bfs_inode_cachep, GFP_KERNEL); if (!bi) return NULL; return &bi->vfs_inode; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index b8c911a4a320..b8fb50c58e6b 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -9085,7 +9085,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) struct btrfs_inode *ei; struct inode *inode; - ei = kmem_cache_alloc(btrfs_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, btrfs_inode_cachep, GFP_KERNEL); if (!ei) return NULL; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index e3322fcb2e8d..9cab86ef94ed 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -447,7 +447,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb) struct ceph_inode_info *ci; int i; - ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); + ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); if (!ci) return NULL; diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index dca42aa87d30..e39b760eb9c2 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -353,7 +353,7 @@ static struct inode * cifs_alloc_inode(struct super_block *sb) { struct cifsInodeInfo *cifs_inode; - cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); + cifs_inode = alloc_inode_sb(sb, cifs_inode_cachep, GFP_KERNEL); if (!cifs_inode) return NULL; cifs_inode->cifsAttrs = 0x20; /* default */ diff --git a/fs/coda/inode.c b/fs/coda/inode.c index d9f1bd7153df..2185328b65c7 100644 --- a/fs/coda/inode.c +++ b/fs/coda/inode.c @@ -43,7 +43,7 @@ static struct kmem_cache * coda_inode_cachep; static struct inode *coda_alloc_inode(struct super_block *sb) { struct coda_inode_info *ei; - ei = kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, coda_inode_cachep, GFP_KERNEL); if (!ei) return NULL; memset(&ei->c_fid, 0, sizeof(struct CodaFid)); diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c index 39116af0390f..0b1c878317ab 100644 --- a/fs/ecryptfs/super.c +++ b/fs/ecryptfs/super.c @@ -38,7 +38,7 @@ static struct inode *ecryptfs_alloc_inode(struct super_block *sb) struct ecryptfs_inode_info *inode_info; struct inode *inode = NULL; - inode_info = kmem_cache_alloc(ecryptfs_inode_info_cache, GFP_KERNEL); + inode_info = alloc_inode_sb(sb, ecryptfs_inode_info_cache, GFP_KERNEL); if (unlikely(!inode_info)) goto out; if (ecryptfs_init_crypt_stat(&inode_info->crypt_stat)) { diff --git a/fs/efs/super.c b/fs/efs/super.c index 62b155b9366b..b287f47c165b 100644 --- a/fs/efs/super.c +++ b/fs/efs/super.c @@ -69,7 +69,7 @@ static struct kmem_cache * efs_inode_cachep; static struct inode *efs_alloc_inode(struct super_block *sb) { struct efs_inode_info *ei; - ei = kmem_cache_alloc(efs_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, efs_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 6a969b1e0ee6..d3de5674ab81 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -83,7 +83,7 @@ static void erofs_inode_init_once(void *ptr) static struct inode *erofs_alloc_inode(struct super_block *sb) { struct erofs_inode *vi = - kmem_cache_alloc(erofs_inode_cachep, GFP_KERNEL); + alloc_inode_sb(sb, erofs_inode_cachep, GFP_KERNEL); if (!vi) return NULL; diff --git a/fs/exfat/super.c b/fs/exfat/super.c index 5539ffc20d16..1b24c9f61be1 100644 --- a/fs/exfat/super.c +++ b/fs/exfat/super.c @@ -182,7 +182,7 @@ static struct inode *exfat_alloc_inode(struct super_block *sb) { struct exfat_inode_info *ei; - ei = kmem_cache_alloc(exfat_inode_cachep, GFP_NOFS); + ei = alloc_inode_sb(sb, exfat_inode_cachep, GFP_NOFS); if (!ei) return NULL; diff --git a/fs/ext2/super.c b/fs/ext2/super.c index d8d580b609ba..8deb03ae4742 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -180,7 +180,7 @@ static struct kmem_cache * ext2_inode_cachep; static struct inode *ext2_alloc_inode(struct super_block *sb) { struct ext2_inode_info *ei; - ei = kmem_cache_alloc(ext2_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, ext2_inode_cachep, GFP_KERNEL); if (!ei) return NULL; ei->i_block_alloc_info = NULL; diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 4e33b5eca694..19c16d9b173d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1292,7 +1292,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) { struct ext4_inode_info *ei; - ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); + ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); if (!ei) return NULL; diff --git a/fs/fat/inode.c b/fs/fat/inode.c index a6f1c6d426d1..38796681cc86 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -745,7 +745,7 @@ static struct kmem_cache *fat_inode_cachep; static struct inode *fat_alloc_inode(struct super_block *sb) { struct msdos_inode_info *ei; - ei = kmem_cache_alloc(fat_inode_cachep, GFP_NOFS); + ei = alloc_inode_sb(sb, fat_inode_cachep, GFP_NOFS); if (!ei) return NULL; diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c index 578a5062706e..22eed5a73ac2 100644 --- a/fs/freevxfs/vxfs_super.c +++ b/fs/freevxfs/vxfs_super.c @@ -124,7 +124,7 @@ static struct inode *vxfs_alloc_inode(struct super_block *sb) { struct vxfs_inode_info *vi; - vi = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL); + vi = alloc_inode_sb(sb, vxfs_inode_cachep, GFP_KERNEL); if (!vi) return NULL; inode_init_once(&vi->vfs_inode); diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 8b89e3ba7df3..6497603fd69c 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -73,7 +73,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) { struct fuse_inode *fi; - fi = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL); + fi = alloc_inode_sb(sb, fuse_inode_cachep, GFP_KERNEL); if (!fi) return NULL; diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 0f93e8beca4d..55440fb51df9 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -1427,7 +1427,7 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb) { struct gfs2_inode *ip; - ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); + ip = alloc_inode_sb(sb, gfs2_inode_cachep, GFP_KERNEL); if (!ip) return NULL; ip->i_flags = 0; diff --git a/fs/hfs/super.c b/fs/hfs/super.c index 12d9bae39363..6764afa98a6f 100644 --- a/fs/hfs/super.c +++ b/fs/hfs/super.c @@ -162,7 +162,7 @@ static struct inode *hfs_alloc_inode(struct super_block *sb) { struct hfs_inode_info *i; - i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL); + i = alloc_inode_sb(sb, hfs_inode_cachep, GFP_KERNEL); return i ? &i->vfs_inode : NULL; } diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index b9e3db3f855f..8479add998b5 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -624,7 +624,7 @@ static struct inode *hfsplus_alloc_inode(struct super_block *sb) { struct hfsplus_inode_info *i; - i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); + i = alloc_inode_sb(sb, hfsplus_inode_cachep, GFP_KERNEL); return i ? &i->vfs_inode : NULL; } diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index d5c9d886cd9f..2123d2bed55b 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -222,7 +222,7 @@ static struct inode *hostfs_alloc_inode(struct super_block *sb) { struct hostfs_inode_info *hi; - hi = kmem_cache_alloc(hostfs_inode_cache, GFP_KERNEL_ACCOUNT); + hi = alloc_inode_sb(sb, hostfs_inode_cache, GFP_KERNEL_ACCOUNT); if (hi == NULL) return NULL; hi->fd = -1; diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index a7dbfc892022..1cb89595b875 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -232,7 +232,7 @@ static struct kmem_cache * hpfs_inode_cachep; static struct inode *hpfs_alloc_inode(struct super_block *sb) { struct hpfs_inode_info *ei; - ei = kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); + ei = alloc_inode_sb(sb, hpfs_inode_cachep, GFP_NOFS); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 49d2e686be74..7e0bd1c629e1 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -1109,7 +1109,7 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb) if (unlikely(!hugetlbfs_dec_free_inodes(sbinfo))) return NULL; - p = kmem_cache_alloc(hugetlbfs_inode_cachep, GFP_KERNEL); + p = alloc_inode_sb(sb, hugetlbfs_inode_cachep, GFP_KERNEL); if (unlikely(!p)) { hugetlbfs_inc_free_inodes(sbinfo); return NULL; diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index 0c6eacfcbeef..d7491692aea3 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -70,7 +70,7 @@ static struct kmem_cache *isofs_inode_cachep; static struct inode *isofs_alloc_inode(struct super_block *sb) { struct iso_inode_info *ei; - ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, isofs_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c index 81ca58c10b72..7ea37f49f1e1 100644 --- a/fs/jffs2/super.c +++ b/fs/jffs2/super.c @@ -39,7 +39,7 @@ static struct inode *jffs2_alloc_inode(struct super_block *sb) { struct jffs2_inode_info *f; - f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL); + f = alloc_inode_sb(sb, jffs2_inode_cachep, GFP_KERNEL); if (!f) return NULL; return &f->vfs_inode; diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 24cbc9946e01..f1a13a74cddf 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -102,7 +102,7 @@ static struct inode *jfs_alloc_inode(struct super_block *sb) { struct jfs_inode_info *jfs_inode; - jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); + jfs_inode = alloc_inode_sb(sb, jfs_inode_cachep, GFP_NOFS); if (!jfs_inode) return NULL; #ifdef CONFIG_QUOTA diff --git a/fs/minix/inode.c b/fs/minix/inode.c index a71f1cf894b9..8a0af80741b5 100644 --- a/fs/minix/inode.c +++ b/fs/minix/inode.c @@ -63,7 +63,7 @@ static struct kmem_cache * minix_inode_cachep; static struct inode *minix_alloc_inode(struct super_block *sb) { struct minix_inode_info *ei; - ei = kmem_cache_alloc(minix_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, minix_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index fda530d5e764..59a63f1bd9ee 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -2241,7 +2241,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) struct inode *nfs_alloc_inode(struct super_block *sb) { struct nfs_inode *nfsi; - nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); + nfsi = alloc_inode_sb(sb, nfs_inode_cachep, GFP_KERNEL); if (!nfsi) return NULL; nfsi->flags = 0UL; diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 63e5fa74016c..3e05c98631ec 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -151,7 +151,7 @@ struct inode *nilfs_alloc_inode(struct super_block *sb) { struct nilfs_inode_info *ii; - ii = kmem_cache_alloc(nilfs_inode_cachep, GFP_NOFS); + ii = alloc_inode_sb(sb, nilfs_inode_cachep, GFP_NOFS); if (!ii) return NULL; ii->i_bh = NULL; diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c index 4474adb393ca..fca18ac72b4f 100644 --- a/fs/ntfs/inode.c +++ b/fs/ntfs/inode.c @@ -310,7 +310,7 @@ struct inode *ntfs_alloc_big_inode(struct super_block *sb) ntfs_inode *ni; ntfs_debug("Entering."); - ni = kmem_cache_alloc(ntfs_big_inode_cache, GFP_NOFS); + ni = alloc_inode_sb(sb, ntfs_big_inode_cache, GFP_NOFS); if (likely(ni != NULL)) { ni->state = 0; return VFS_I(ni); diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index 29813200c7af..278dcf502410 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -399,7 +399,7 @@ static struct kmem_cache *ntfs_inode_cachep; static struct inode *ntfs_alloc_inode(struct super_block *sb) { - struct ntfs_inode *ni = kmem_cache_alloc(ntfs_inode_cachep, GFP_NOFS); + struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS); if (!ni) return NULL; diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index fa0a14f199eb..e360543ad7e7 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -280,7 +280,7 @@ static struct inode *dlmfs_alloc_inode(struct super_block *sb) { struct dlmfs_inode_private *ip; - ip = kmem_cache_alloc(dlmfs_inode_cache, GFP_NOFS); + ip = alloc_inode_sb(sb, dlmfs_inode_cache, GFP_NOFS); if (!ip) return NULL; diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 1286b88b6fa1..0452d5835ffe 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -549,7 +549,7 @@ static struct inode *ocfs2_alloc_inode(struct super_block *sb) { struct ocfs2_inode_info *oi; - oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); + oi = alloc_inode_sb(sb, ocfs2_inode_cachep, GFP_NOFS); if (!oi) return NULL; diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index f825176ff4ed..f0b7f4d51a17 100644 --- a/fs/openpromfs/inode.c +++ b/fs/openpromfs/inode.c @@ -335,7 +335,7 @@ static struct inode *openprom_alloc_inode(struct super_block *sb) { struct op_inode_info *oi; - oi = kmem_cache_alloc(op_inode_cachep, GFP_KERNEL); + oi = alloc_inode_sb(sb, op_inode_cachep, GFP_KERNEL); if (!oi) return NULL; diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c index d90d8addbfc2..5254256a224d 100644 --- a/fs/orangefs/super.c +++ b/fs/orangefs/super.c @@ -107,7 +107,7 @@ static struct inode *orangefs_alloc_inode(struct super_block *sb) { struct orangefs_inode_s *orangefs_inode; - orangefs_inode = kmem_cache_alloc(orangefs_inode_cache, GFP_KERNEL); + orangefs_inode = alloc_inode_sb(sb, orangefs_inode_cache, GFP_KERNEL); if (!orangefs_inode) return NULL; diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 265181c110ae..a1987aef2dfb 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -174,7 +174,7 @@ static struct kmem_cache *ovl_inode_cachep; static struct inode *ovl_alloc_inode(struct super_block *sb) { - struct ovl_inode *oi = kmem_cache_alloc(ovl_inode_cachep, GFP_KERNEL); + struct ovl_inode *oi = alloc_inode_sb(sb, ovl_inode_cachep, GFP_KERNEL); if (!oi) return NULL; diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 599eb724ff2d..cc0a406d3a19 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -66,7 +66,7 @@ static struct inode *proc_alloc_inode(struct super_block *sb) { struct proc_inode *ei; - ei = kmem_cache_alloc(proc_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, proc_inode_cachep, GFP_KERNEL); if (!ei) return NULL; ei->pid = NULL; diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c index 3fb7fc819b4f..a635bb6615e9 100644 --- a/fs/qnx4/inode.c +++ b/fs/qnx4/inode.c @@ -338,7 +338,7 @@ static struct kmem_cache *qnx4_inode_cachep; static struct inode *qnx4_alloc_inode(struct super_block *sb) { struct qnx4_inode_info *ei; - ei = kmem_cache_alloc(qnx4_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, qnx4_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c index 61191f7bdf62..9d8e7e9788a1 100644 --- a/fs/qnx6/inode.c +++ b/fs/qnx6/inode.c @@ -597,7 +597,7 @@ static struct kmem_cache *qnx6_inode_cachep; static struct inode *qnx6_alloc_inode(struct super_block *sb) { struct qnx6_inode_info *ei; - ei = kmem_cache_alloc(qnx6_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, qnx6_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 82e09901462e..756c4916c7ae 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -639,7 +639,7 @@ static struct kmem_cache *reiserfs_inode_cachep; static struct inode *reiserfs_alloc_inode(struct super_block *sb) { struct reiserfs_inode_info *ei; - ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, reiserfs_inode_cachep, GFP_KERNEL); if (!ei) return NULL; atomic_set(&ei->openers, 0); diff --git a/fs/romfs/super.c b/fs/romfs/super.c index 259f684d9236..9e6bbb4219de 100644 --- a/fs/romfs/super.c +++ b/fs/romfs/super.c @@ -375,7 +375,7 @@ static struct inode *romfs_alloc_inode(struct super_block *sb) { struct romfs_inode_info *inode; - inode = kmem_cache_alloc(romfs_inode_cachep, GFP_KERNEL); + inode = alloc_inode_sb(sb, romfs_inode_cachep, GFP_KERNEL); return inode ? &inode->vfs_inode : NULL; } diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c index bb44ff4c5cc6..32565dafa7f3 100644 --- a/fs/squashfs/super.c +++ b/fs/squashfs/super.c @@ -551,7 +551,7 @@ static void __exit exit_squashfs_fs(void) static struct inode *squashfs_alloc_inode(struct super_block *sb) { struct squashfs_inode_info *ei = - kmem_cache_alloc(squashfs_inode_cachep, GFP_KERNEL); + alloc_inode_sb(sb, squashfs_inode_cachep, GFP_KERNEL); return ei ? &ei->vfs_inode : NULL; } diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c index be47263b8605..9e8d4a6fb2f3 100644 --- a/fs/sysv/inode.c +++ b/fs/sysv/inode.c @@ -306,7 +306,7 @@ static struct inode *sysv_alloc_inode(struct super_block *sb) { struct sysv_inode_info *si; - si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL); + si = alloc_inode_sb(sb, sysv_inode_cachep, GFP_KERNEL); if (!si) return NULL; return &si->vfs_inode; diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index f0fb25727d96..73b51f8e6817 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -268,7 +268,7 @@ static struct inode *ubifs_alloc_inode(struct super_block *sb) { struct ubifs_inode *ui; - ui = kmem_cache_alloc(ubifs_inode_slab, GFP_NOFS); + ui = alloc_inode_sb(sb, ubifs_inode_slab, GFP_NOFS); if (!ui) return NULL; diff --git a/fs/udf/super.c b/fs/udf/super.c index f26b5e0b84b6..48871615e489 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -136,7 +136,7 @@ static struct kmem_cache *udf_inode_cachep; static struct inode *udf_alloc_inode(struct super_block *sb) { struct udf_inode_info *ei; - ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, udf_inode_cachep, GFP_KERNEL); if (!ei) return NULL; diff --git a/fs/ufs/super.c b/fs/ufs/super.c index 00a01471ea05..23377c1baed9 100644 --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -1443,7 +1443,7 @@ static struct inode *ufs_alloc_inode(struct super_block *sb) { struct ufs_inode_info *ei; - ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); + ei = alloc_inode_sb(sb, ufs_inode_cachep, GFP_NOFS); if (!ei) return NULL; diff --git a/fs/vboxsf/super.c b/fs/vboxsf/super.c index 37dd3fe5b1e9..d2f6df69f611 100644 --- a/fs/vboxsf/super.c +++ b/fs/vboxsf/super.c @@ -241,7 +241,7 @@ static struct inode *vboxsf_alloc_inode(struct super_block *sb) { struct vboxsf_inode *sf_i; - sf_i = kmem_cache_alloc(vboxsf_inode_cachep, GFP_NOFS); + sf_i = alloc_inode_sb(sb, vboxsf_inode_cachep, GFP_NOFS); if (!sf_i) return NULL; diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index da4af2142a2b..57b4fd7d7c5e 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -77,7 +77,7 @@ xfs_inode_alloc( * XXX: If this didn't occur in transactions, we could drop GFP_NOFAIL * and return NULL here on ENOMEM. */ - ip = kmem_cache_alloc(xfs_inode_cache, GFP_KERNEL | __GFP_NOFAIL); + ip = alloc_inode_sb(mp->m_super, xfs_inode_cache, GFP_KERNEL | __GFP_NOFAIL); if (inode_init_always(mp->m_super, VFS_I(ip))) { kmem_cache_free(xfs_inode_cache, ip); diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c index 259ee2bda492..e88e16a1529a 100644 --- a/fs/zonefs/super.c +++ b/fs/zonefs/super.c @@ -1137,7 +1137,7 @@ static struct inode *zonefs_alloc_inode(struct super_block *sb) { struct zonefs_inode_info *zi; - zi = kmem_cache_alloc(zonefs_inode_cachep, GFP_KERNEL); + zi = alloc_inode_sb(sb, zonefs_inode_cachep, GFP_KERNEL); if (!zi) return NULL; diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 5becca9be867..7c08eb3c258d 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -486,7 +486,7 @@ static struct inode *mqueue_alloc_inode(struct super_block *sb) { struct mqueue_inode_info *ei; - ei = kmem_cache_alloc(mqueue_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, mqueue_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; diff --git a/mm/shmem.c b/mm/shmem.c index 18f93c2d68f1..b8490cbbc1a0 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -3714,7 +3714,7 @@ static struct kmem_cache *shmem_inode_cachep; static struct inode *shmem_alloc_inode(struct super_block *sb) { struct shmem_inode_info *info; - info = kmem_cache_alloc(shmem_inode_cachep, GFP_KERNEL); + info = alloc_inode_sb(sb, shmem_inode_cachep, GFP_KERNEL); if (!info) return NULL; return &info->vfs_inode; diff --git a/net/socket.c b/net/socket.c index 7f64a6eccf63..cee567ccd99c 100644 --- a/net/socket.c +++ b/net/socket.c @@ -300,7 +300,7 @@ static struct inode *sock_alloc_inode(struct super_block *sb) { struct socket_alloc *ei; - ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); + ei = alloc_inode_sb(sb, sock_inode_cachep, GFP_KERNEL); if (!ei) return NULL; init_waitqueue_head(&ei->socket.wq.wait); diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index ee5336d73fdd..7ed4accc480d 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -197,7 +197,7 @@ static struct inode * rpc_alloc_inode(struct super_block *sb) { struct rpc_inode *rpci; - rpci = kmem_cache_alloc(rpc_inode_cachep, GFP_KERNEL); + rpci = alloc_inode_sb(sb, rpc_inode_cachep, GFP_KERNEL); if (!rpci) return NULL; return &rpci->vfs_inode; From patchwork Mon Dec 20 08:56:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687391 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F334FC433EF for ; Mon, 20 Dec 2021 08:58:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232442AbhLTI6N (ORCPT ); Mon, 20 Dec 2021 03:58:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229599AbhLTI6M (ORCPT ); Mon, 20 Dec 2021 03:58:12 -0500 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12756C061574 for ; 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Signed-off-by: Muchun Song Acked-by: Roman Gushchin --- fs/f2fs/super.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 040b6d02e1d8..6cdbf520b435 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1311,8 +1311,12 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb) { struct f2fs_inode_info *fi; - fi = f2fs_kmem_cache_alloc(f2fs_inode_cachep, - GFP_F2FS_ZERO, false, F2FS_SB(sb)); + if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) { + f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC); + return NULL; + } + + fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO); if (!fi) return NULL; From patchwork Mon Dec 20 08:56:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687393 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6203C433F5 for ; Mon, 20 Dec 2021 08:58:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238177AbhLTI6X (ORCPT ); Mon, 20 Dec 2021 03:58:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37422 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238178AbhLTI6V (ORCPT ); Mon, 20 Dec 2021 03:58:21 -0500 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70B49C06173E for ; Mon, 20 Dec 2021 00:58:21 -0800 (PST) Received: by mail-pl1-x636.google.com with SMTP id u16so1497565plg.9 for ; Mon, 20 Dec 2021 00:58:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=W7N2ct9tvwpvEjrUOuEEAnTDqNZXNpAiEvvqkroYr+g=; b=QZXa/UkcMj7OIM0da+GzV5d/fUa7Ms0fpFshUq9dGaOgmBscFnDPbyob11rrtTYR7c J8yomK+Pdy7OyE7GLD0ChMNKFeIPWqed72C0+1Qv22iLqvZF+6xMyM06GPXOaalsDhDq x1gKDT/IajRhMChhO54psatBfyuW45+BQZrKeEl9gjcVooddKjnqU7d1dXbmi7VYNl3v dee+sTyBu28Z5iEea+Td8RQ9IA9tDnX2rczUyisXDIOLo2UiI/e8oB6UU9Vf7utA/oyY n0nPZZfXQh5BDTHLEidJiFgDq4GRfo6S51j3wQE9TjdJ+qH6j4sfS5DaUVrSQvuio1aG iXzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=W7N2ct9tvwpvEjrUOuEEAnTDqNZXNpAiEvvqkroYr+g=; b=D8FsL8UgyTyURAk02pS4ymDruTWyUu4bhmESMqJZzuOpjCynX+GRUE/8G45VY9paDO 5fkIGs3fTfWzzsaVEFmyJ03BKX5x6bYBAznL7hoFIPvZ0f8Dljj6Fs7o6FHLcU3lPPAw Fyszy3IJcU/BQnNwaKcgMk3rd4O3q8MNZENvdxW1w52BVDNnG5p3i/gX6xcD5JSDFsqp woZ7d7uPIAipSz/nbjG8Jzqn9dSq39Dd+fzEN6nZ6ljQqRobXWd1wMmvusN7nvUgeLSm XrIDHLzQEeBRvjNdpA2t8PQuCNod6uiVjXwSLgh5465XlAV2xAMogeHWWoAgoQN8Lxae 9OPg== X-Gm-Message-State: AOAM532yRhXty+qmdeLhOXdpkE+8/pEL067xZEY1ZTUzlj2nPKJ4UppA WvLjU1YL5SZsFSA7f/EDiAb6yA== X-Google-Smtp-Source: ABdhPJwSQ/OS/edjn3SJrIgOS5QYli36TpUCxhaWSqiLQOQ0iTZPdTODZFhb2DYgjSwDx+rEcdt75g== X-Received: by 2002:a17:902:b944:b0:148:be4b:66dd with SMTP id h4-20020a170902b94400b00148be4b66ddmr15867095pls.63.1639990700861; Mon, 20 Dec 2021 00:58:20 -0800 (PST) Received: from localhost.localdomain ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id m11sm18441647pfk.27.2021.12.20.00.58.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Dec 2021 00:58:20 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 06/16] nfs42: use a specific kmem_cache to allocate nfs4_xattr_entry Date: Mon, 20 Dec 2021 16:56:39 +0800 Message-Id: <20211220085649.8196-7-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org If we want to add the allocated objects to its list_lru, we should use kmem_cache_alloc_lru() to allocate objects. So intruduce nfs4_xattr_entry_cachep which is used to allocate nfs4_xattr_entry. Signed-off-by: Muchun Song --- fs/nfs/nfs42xattr.c | 95 ++++++++++++++++++++++++++--------------------------- 1 file changed, 47 insertions(+), 48 deletions(-) diff --git a/fs/nfs/nfs42xattr.c b/fs/nfs/nfs42xattr.c index 1c4d2a05b401..5b7af9080db0 100644 --- a/fs/nfs/nfs42xattr.c +++ b/fs/nfs/nfs42xattr.c @@ -81,7 +81,7 @@ struct nfs4_xattr_entry { struct hlist_node hnode; struct list_head lru; struct list_head dispose; - char *xattr_name; + const char *xattr_name; void *xattr_value; size_t xattr_size; struct nfs4_xattr_bucket *bucket; @@ -98,6 +98,7 @@ static struct list_lru nfs4_xattr_entry_lru; static struct list_lru nfs4_xattr_large_entry_lru; static struct kmem_cache *nfs4_xattr_cache_cachep; +static struct kmem_cache *nfs4_xattr_entry_cachep; /* * Hashing helper functions. @@ -177,49 +178,27 @@ nfs4_xattr_alloc_entry(const char *name, const void *value, { struct nfs4_xattr_entry *entry; void *valp; - char *namep; - size_t alloclen, slen; - char *buf; - uint32_t flags; + const char *namep; + uint32_t flags = len > PAGE_SIZE ? NFS4_XATTR_ENTRY_EXTVAL : 0; + gfp_t gfp = GFP_KERNEL_ACCOUNT | GFP_NOFS; + struct list_lru *lru; BUILD_BUG_ON(sizeof(struct nfs4_xattr_entry) + XATTR_NAME_MAX + 1 > PAGE_SIZE); - alloclen = sizeof(struct nfs4_xattr_entry); - if (name != NULL) { - slen = strlen(name) + 1; - alloclen += slen; - } else - slen = 0; - - if (alloclen + len <= PAGE_SIZE) { - alloclen += len; - flags = 0; - } else { - flags = NFS4_XATTR_ENTRY_EXTVAL; - } - - buf = kmalloc(alloclen, GFP_KERNEL_ACCOUNT | GFP_NOFS); - if (buf == NULL) + lru = flags & NFS4_XATTR_ENTRY_EXTVAL ? &nfs4_xattr_large_entry_lru : + &nfs4_xattr_entry_lru; + entry = kmem_cache_alloc_lru(nfs4_xattr_entry_cachep, lru, gfp); + if (!entry) return NULL; - entry = (struct nfs4_xattr_entry *)buf; - - if (name != NULL) { - namep = buf + sizeof(struct nfs4_xattr_entry); - memcpy(namep, name, slen); - } else { - namep = NULL; - } - - - if (flags & NFS4_XATTR_ENTRY_EXTVAL) { - valp = kvmalloc(len, GFP_KERNEL_ACCOUNT | GFP_NOFS); - if (valp == NULL) { - kfree(buf); - return NULL; - } - } else if (len != 0) { - valp = buf + sizeof(struct nfs4_xattr_entry) + slen; + namep = kstrdup_const(name, gfp); + if (!namep && name) + goto free_buf; + + if (len != 0) { + valp = kvmalloc(len, gfp); + if (!valp) + goto free_name; } else valp = NULL; @@ -232,23 +211,23 @@ nfs4_xattr_alloc_entry(const char *name, const void *value, entry->flags = flags; entry->xattr_value = valp; - kref_init(&entry->ref); entry->xattr_name = namep; entry->xattr_size = len; - entry->bucket = NULL; - INIT_LIST_HEAD(&entry->lru); - INIT_LIST_HEAD(&entry->dispose); - INIT_HLIST_NODE(&entry->hnode); return entry; +free_name: + kfree_const(namep); +free_buf: + kmem_cache_free(nfs4_xattr_entry_cachep, entry); + return NULL; } static void nfs4_xattr_free_entry(struct nfs4_xattr_entry *entry) { - if (entry->flags & NFS4_XATTR_ENTRY_EXTVAL) - kvfree(entry->xattr_value); - kfree(entry); + kvfree(entry->xattr_value); + kfree_const(entry->xattr_name); + kmem_cache_free(nfs4_xattr_entry_cachep, entry); } static void @@ -289,7 +268,7 @@ nfs4_xattr_alloc_cache(void) { struct nfs4_xattr_cache *cache; - cache = kmem_cache_alloc(nfs4_xattr_cache_cachep, + cache = kmem_cache_alloc_lru(nfs4_xattr_cache_cachep, &nfs4_xattr_cache_lru, GFP_KERNEL_ACCOUNT | GFP_NOFS); if (cache == NULL) return NULL; @@ -992,6 +971,17 @@ static void nfs4_xattr_cache_init_once(void *p) INIT_LIST_HEAD(&cache->dispose); } +static void nfs4_xattr_entry_init_once(void *p) +{ + struct nfs4_xattr_entry *entry = p; + + kref_init(&entry->ref); + entry->bucket = NULL; + INIT_LIST_HEAD(&entry->lru); + INIT_LIST_HEAD(&entry->dispose); + INIT_HLIST_NODE(&entry->hnode); +} + int __init nfs4_xattr_cache_init(void) { int ret = 0; @@ -1003,6 +993,13 @@ int __init nfs4_xattr_cache_init(void) if (nfs4_xattr_cache_cachep == NULL) return -ENOMEM; + nfs4_xattr_entry_cachep = kmem_cache_create("nfs4_xattr_entry", + sizeof(struct nfs4_xattr_entry), 0, + (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT), + nfs4_xattr_entry_init_once); + if (!nfs4_xattr_entry_cachep) + goto out5; + ret = list_lru_init_memcg(&nfs4_xattr_large_entry_lru, &nfs4_xattr_large_entry_shrinker); if (ret) @@ -1040,6 +1037,8 @@ int __init nfs4_xattr_cache_init(void) out3: list_lru_destroy(&nfs4_xattr_large_entry_lru); out4: + kmem_cache_destroy(nfs4_xattr_entry_cachep); +out5: kmem_cache_destroy(nfs4_xattr_cache_cachep); return ret; From patchwork Mon Dec 20 08:56:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687395 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 28B6BC4332F for ; Mon, 20 Dec 2021 08:58:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234875AbhLTI6b (ORCPT ); Mon, 20 Dec 2021 03:58:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234762AbhLTI6a (ORCPT ); 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Mon, 20 Dec 2021 00:58:29 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 07/16] mm: dcache: use kmem_cache_alloc_lru() to allocate dentry Date: Mon, 20 Dec 2021 16:56:40 +0800 Message-Id: <20211220085649.8196-8-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Like inode cache, the dentry will also be added to its memcg list_lru. So replace kmem_cache_alloc() with kmem_cache_alloc_lru() to allocate dentry. Signed-off-by: Muchun Song Acked-by: Roman Gushchin --- fs/dcache.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/dcache.c b/fs/dcache.c index cf871a81f4fd..36d4806d7284 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1741,7 +1741,8 @@ static struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name) char *dname; int err; - dentry = kmem_cache_alloc(dentry_cache, GFP_KERNEL); + dentry = kmem_cache_alloc_lru(dentry_cache, &sb->s_dentry_lru, + GFP_KERNEL); if (!dentry) return NULL; From patchwork Mon Dec 20 08:56:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687397 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1706C4332F for ; Mon, 20 Dec 2021 08:58:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238186AbhLTI6o (ORCPT ); Mon, 20 Dec 2021 03:58:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234894AbhLTI6n (ORCPT ); Mon, 20 Dec 2021 03:58:43 -0500 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A651C06173F for ; Mon, 20 Dec 2021 00:58:43 -0800 (PST) Received: by mail-pj1-x1036.google.com with SMTP id v16so8685344pjn.1 for ; Mon, 20 Dec 2021 00:58:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ZrLB05wu75xtprEgkWCOZKZLcRJIsJQvvD7shKptZC8=; b=p75duGBHD+hgKaVEl9+L5IXqWpMUnqqbaTE/oyZCHx69y4q+9TfwEzSkT6+AxDMZua 9AvQflMkkj5S9Qkw9ZSAD+Dh0v72TS4p+rZXc1DsaIySlZ8+IlGOAfBKjs4uXTFa18Mr RaCmkpN8pOW3zcxdid4hA5au2Mwogr+tedqOIBtfSD30eGZ+ESsT7DgZeSBg25Aowrb1 DPhavswlObDAqkXM3G0dgy8iNjMvg5yzVw5396JoDpZFzMvxS1855wqUOtWoNy6qtVw5 R4j7KoXEaR3A5HOnGG0b1Ea79G5dnd3iebDBhOixd2XPesajczf1TgKqH2WPImoBmE4Q i76A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ZrLB05wu75xtprEgkWCOZKZLcRJIsJQvvD7shKptZC8=; b=0vUIIFOyJsx2ftEAdQqEkKGxdGdf4la5qSbZa+gYSdWf9rnDoO82NC9xpD2ylLQJhi CuX3CC7mDVbG088X/q1UZNCjnA5chTkMiu1mifCDOIrvRon+JOxqlUvg0vOOGR1jfXl1 ECC1lcFg7+o7TLf9z3jPZD4RL/a8/u6ZWSK7tnvTnTNuUKmbQ0laatf2ReQOvV1RMi8a Nvza7htwmBhmUVVvKJ4PMw43G+mWk4iA5mE+Bgg+z9fgV8aRrVQL1Hs8+XipSdGpUsjH wEWQ4v/kmHTU0YLIOR7lUeS6aC7VrnwqKP47LyEclO19h6YPCqTUeBZGMGuudD5oyaaq ping== X-Gm-Message-State: AOAM533wbw+VIBZ2/Aw+9o00+jdUS/SAjH+JSV0GNA/cCIctNrCW4KJP AdQ07odZa9ONISiKKud883zKEQ== X-Google-Smtp-Source: ABdhPJxY/dg4Nptrmuy7cfP9oqGxE6ii/4/y1M4sUYuSr+7yNONpRSggWvhJsU16nw1CXt3VUH25Qw== X-Received: by 2002:a17:90a:2a8f:: with SMTP id j15mr27155484pjd.204.1639990722630; Mon, 20 Dec 2021 00:58:42 -0800 (PST) Received: from localhost.localdomain ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id m11sm18441647pfk.27.2021.12.20.00.58.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Dec 2021 00:58:42 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 08/16] xarray: use kmem_cache_alloc_lru to allocate xa_node Date: Mon, 20 Dec 2021 16:56:41 +0800 Message-Id: <20211220085649.8196-9-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The workingset will add the xa_node to the shadow_nodes list. So the allocation of xa_node should be done by kmem_cache_alloc_lru(). Using xas_set_lru() to pass the list_lru which we want to insert xa_node into to set up the xa_node reclaim context correctly. Signed-off-by: Muchun Song Acked-by: Johannes Weiner Acked-by: Roman Gushchin --- include/linux/swap.h | 5 ++++- include/linux/xarray.h | 9 ++++++++- lib/xarray.c | 10 +++++----- mm/workingset.c | 2 +- 4 files changed, 18 insertions(+), 8 deletions(-) diff --git a/include/linux/swap.h b/include/linux/swap.h index d1ea44b31f19..1ae9d3473c02 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -334,9 +334,12 @@ void workingset_activation(struct folio *folio); /* Only track the nodes of mappings with shadow entries */ void workingset_update_node(struct xa_node *node); +extern struct list_lru shadow_nodes; #define mapping_set_update(xas, mapping) do { \ - if (!dax_mapping(mapping) && !shmem_mapping(mapping)) \ + if (!dax_mapping(mapping) && !shmem_mapping(mapping)) { \ xas_set_update(xas, workingset_update_node); \ + xas_set_lru(xas, &shadow_nodes); \ + } \ } while (0) /* linux/mm/page_alloc.c */ diff --git a/include/linux/xarray.h b/include/linux/xarray.h index a91e3d90df8a..31f3e5ef3c7b 100644 --- a/include/linux/xarray.h +++ b/include/linux/xarray.h @@ -1317,6 +1317,7 @@ struct xa_state { struct xa_node *xa_node; struct xa_node *xa_alloc; xa_update_node_t xa_update; + struct list_lru *xa_lru; }; /* @@ -1336,7 +1337,8 @@ struct xa_state { .xa_pad = 0, \ .xa_node = XAS_RESTART, \ .xa_alloc = NULL, \ - .xa_update = NULL \ + .xa_update = NULL, \ + .xa_lru = NULL, \ } /** @@ -1613,6 +1615,11 @@ static inline void xas_set_update(struct xa_state *xas, xa_update_node_t update) xas->xa_update = update; } +static inline void xas_set_lru(struct xa_state *xas, struct list_lru *lru) +{ + xas->xa_lru = lru; +} + /** * xas_next_entry() - Advance iterator to next present entry. * @xas: XArray operation state. diff --git a/lib/xarray.c b/lib/xarray.c index f5d8f54907b4..e9b818abc823 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -302,7 +302,7 @@ bool xas_nomem(struct xa_state *xas, gfp_t gfp) } if (xas->xa->xa_flags & XA_FLAGS_ACCOUNT) gfp |= __GFP_ACCOUNT; - xas->xa_alloc = kmem_cache_alloc(radix_tree_node_cachep, gfp); + xas->xa_alloc = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp); if (!xas->xa_alloc) return false; xas->xa_alloc->parent = NULL; @@ -334,10 +334,10 @@ static bool __xas_nomem(struct xa_state *xas, gfp_t gfp) gfp |= __GFP_ACCOUNT; if (gfpflags_allow_blocking(gfp)) { xas_unlock_type(xas, lock_type); - xas->xa_alloc = kmem_cache_alloc(radix_tree_node_cachep, gfp); + xas->xa_alloc = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp); xas_lock_type(xas, lock_type); } else { - xas->xa_alloc = kmem_cache_alloc(radix_tree_node_cachep, gfp); + xas->xa_alloc = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp); } if (!xas->xa_alloc) return false; @@ -371,7 +371,7 @@ static void *xas_alloc(struct xa_state *xas, unsigned int shift) if (xas->xa->xa_flags & XA_FLAGS_ACCOUNT) gfp |= __GFP_ACCOUNT; - node = kmem_cache_alloc(radix_tree_node_cachep, gfp); + node = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp); if (!node) { xas_set_err(xas, -ENOMEM); return NULL; @@ -1014,7 +1014,7 @@ void xas_split_alloc(struct xa_state *xas, void *entry, unsigned int order, void *sibling = NULL; struct xa_node *node; - node = kmem_cache_alloc(radix_tree_node_cachep, gfp); + node = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp); if (!node) goto nomem; node->array = xas->xa; diff --git a/mm/workingset.c b/mm/workingset.c index 8c03afe1d67c..979c7130c266 100644 --- a/mm/workingset.c +++ b/mm/workingset.c @@ -429,7 +429,7 @@ void workingset_activation(struct folio *folio) * point where they would still be useful. */ -static struct list_lru shadow_nodes; +struct list_lru shadow_nodes; void workingset_update_node(struct xa_node *node) { From patchwork Mon Dec 20 08:56:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687399 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B0F8C433F5 for ; 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Mon, 20 Dec 2021 00:58:52 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 09/16] mm: memcontrol: move memcg_online_kmem() to mem_cgroup_css_online() Date: Mon, 20 Dec 2021 16:56:42 +0800 Message-Id: <20211220085649.8196-10-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org It will simplify the code if moving memcg_online_kmem() to mem_cgroup_css_online() and do not need to set ->kmemcg_id to -1 to indicate the memcg is offline. In the next patch, ->kmemcg_id will be used to sync list lru reparenting which requires not to change ->kmemcg_id. Signed-off-by: Muchun Song Acked-by: Roman Gushchin --- mm/memcontrol.c | 37 ++++++++++++++++--------------------- 1 file changed, 16 insertions(+), 21 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index d505b43d5f3b..ec7a62f39326 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3604,7 +3604,8 @@ static int memcg_online_kmem(struct mem_cgroup *memcg) if (cgroup_memory_nokmem) return 0; - BUG_ON(memcg->kmemcg_id >= 0); + if (unlikely(mem_cgroup_is_root(memcg))) + return 0; memcg_id = memcg_alloc_cache_id(); if (memcg_id < 0) @@ -3630,7 +3631,10 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg) struct mem_cgroup *parent; int kmemcg_id; - if (memcg->kmemcg_id == -1) + if (cgroup_memory_nokmem) + return; + + if (unlikely(mem_cgroup_is_root(memcg))) return; parent = parent_mem_cgroup(memcg); @@ -3640,7 +3644,6 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg) memcg_reparent_objcgs(memcg, parent); kmemcg_id = memcg->kmemcg_id; - BUG_ON(kmemcg_id < 0); /* * After we have finished memcg_reparent_objcgs(), all list_lrus @@ -3651,7 +3654,6 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg) memcg_drain_all_list_lrus(kmemcg_id, parent); memcg_free_cache_id(kmemcg_id); - memcg->kmemcg_id = -1; } #else static int memcg_online_kmem(struct mem_cgroup *memcg) @@ -5159,7 +5161,6 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css) { struct mem_cgroup *parent = mem_cgroup_from_css(parent_css); struct mem_cgroup *memcg, *old_memcg; - long error = -ENOMEM; old_memcg = set_active_memcg(parent); memcg = mem_cgroup_alloc(); @@ -5188,34 +5189,26 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css) return &memcg->css; } - /* The following stuff does not apply to the root */ - error = memcg_online_kmem(memcg); - if (error) - goto fail; - if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket) static_branch_inc(&memcg_sockets_enabled_key); return &memcg->css; -fail: - mem_cgroup_id_remove(memcg); - mem_cgroup_free(memcg); - return ERR_PTR(error); } static int mem_cgroup_css_online(struct cgroup_subsys_state *css) { struct mem_cgroup *memcg = mem_cgroup_from_css(css); + if (memcg_online_kmem(memcg)) + goto remove_id; + /* * A memcg must be visible for expand_shrinker_info() * by the time the maps are allocated. So, we allocate maps * here, when for_each_mem_cgroup() can't skip it. */ - if (alloc_shrinker_info(memcg)) { - mem_cgroup_id_remove(memcg); - return -ENOMEM; - } + if (alloc_shrinker_info(memcg)) + goto offline_kmem; /* Online state pins memcg ID, memcg ID pins CSS */ refcount_set(&memcg->id.ref, 1); @@ -5225,6 +5218,11 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css) queue_delayed_work(system_unbound_wq, &stats_flush_dwork, 2UL*HZ); return 0; +offline_kmem: + memcg_offline_kmem(memcg); +remove_id: + mem_cgroup_id_remove(memcg); + return -ENOMEM; } static void mem_cgroup_css_offline(struct cgroup_subsys_state *css) @@ -5282,9 +5280,6 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css) cancel_work_sync(&memcg->high_work); mem_cgroup_remove_from_trees(memcg); free_shrinker_info(memcg); - - /* Need to offline kmem if online_css() fails */ - memcg_offline_kmem(memcg); mem_cgroup_free(memcg); } From patchwork Mon Dec 20 08:56:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687401 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4ED0EC433F5 for ; Mon, 20 Dec 2021 08:59:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238216AbhLTI7F (ORCPT ); Mon, 20 Dec 2021 03:59:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231665AbhLTI7E (ORCPT ); Mon, 20 Dec 2021 03:59:04 -0500 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10380C06173E for ; Mon, 20 Dec 2021 00:59:04 -0800 (PST) Received: by mail-pl1-x62e.google.com with SMTP id n8so7572765plf.4 for ; Mon, 20 Dec 2021 00:59:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=QfelA9A7zZgAox1W6OKv950nSvHitTlpVw0BCbEGLEM=; b=43k6fAkuD7Dvl5iue76l01jFgYVRycluHoFw31d1HGfzCsDA21ZNMYJYHx5XUm1c4B gPPu1ATOesfq6rAj3TeNZVlrOp1G2CyaWveR6W6+SJ6EhRazR64SfKlUyfZSkLZLfSWq dkFOK9pgfYkfIwac1vX55d6yOfMPVHeBUlBPU0CY3G7tMmP/EYIs8YyyjWMbAiujDeHu I28mNSoCrG0ovvC2dIBs384UrqejCBzqlzGBsd/j/o3lCIq6MTUYYQLdPVtDStjI45Da UXk//cT7dq9g3THM/KmmH78whaTA+RA9r+5jDwQHMllmYH/qGHWqewgINqB/gdlRqNUA dDDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QfelA9A7zZgAox1W6OKv950nSvHitTlpVw0BCbEGLEM=; b=BxK9JjSsj3pHztqqrEv+dbn8hXgzijldb4Sfl+NXwFmffDVmZAWFTga1VxbeRSYdv5 tuCmSW8o7mvgsn6/x5KFN6iLbAkhrA03urqEfpjaQANGyulXIssg6K0r87wJdry4IoWp k6qHV4mAA9yyDr3wD4Zm7l/ZaQ5vdWQLqHAPrOghQpKGNjjPGZNgwEToQM3s8NICu/ze lY/SfQ1H0TvYpN6fcaf2ibGDc7GxsB+LmIYBTanHSb23mX6lHBMjeFHns7yFNsLYis4l sIYI3bOnEwo1nZPn2TcFa7AG8gD9AY/WO1dEaGS38ph9ScZHr6LuhJYG+VHx6hE2B3CK k96Q== X-Gm-Message-State: AOAM5313/Dl6vVtnL0Cx4NJD2NBjdFwq5PLd+bdNfyhY5ST0EXjHHsqg AukbOfsu6/DTKS9aLOVVRs+Dgg== X-Google-Smtp-Source: ABdhPJzqSueKRkKx43yFYffuag7dzSeO1wCiG354NO7osOrVuOG4bmokawfkadTNMKIqYNNNICZCAw== X-Received: by 2002:a17:90a:1189:: with SMTP id e9mr18928720pja.153.1639990743549; Mon, 20 Dec 2021 00:59:03 -0800 (PST) Received: from localhost.localdomain ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id m11sm18441647pfk.27.2021.12.20.00.58.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Dec 2021 00:59:03 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 10/16] mm: list_lru: allocate list_lru_one only when needed Date: Mon, 20 Dec 2021 16:56:43 +0800 Message-Id: <20211220085649.8196-11-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org In our server, we found a suspected memory leak problem. The kmalloc-32 consumes more than 6GB of memory. Other kmem_caches consume less than 2GB memory. After our in-depth analysis, the memory consumption of kmalloc-32 slab cache is the cause of list_lru_one allocation. crash> p memcg_nr_cache_ids memcg_nr_cache_ids = $2 = 24574 memcg_nr_cache_ids is very large and memory consumption of each list_lru can be calculated with the following formula. num_numa_node * memcg_nr_cache_ids * 32 (kmalloc-32) There are 4 numa nodes in our system, so each list_lru consumes ~3MB. crash> list super_blocks | wc -l 952 Every mount will register 2 list lrus, one is for inode, another is for dentry. There are 952 super_blocks. So the total memory is 952 * 2 * 3 MB (~5.6GB). But the number of memory cgroup is less than 500. So I guess more than 12286 containers have been deployed on this machine (I do not know why there are so many containers, it may be a user's bug or the user really want to do that). And memcg_nr_cache_ids has not been reduced to a suitable value. This can waste a lot of memory. Now the infrastructure for dynamic list_lru_one allocation is ready, so remove statically allocated memory code to save memory. Signed-off-by: Muchun Song --- include/linux/list_lru.h | 7 +-- mm/list_lru.c | 121 ++++++++++++++++++++++++++--------------------- mm/memcontrol.c | 6 ++- 3 files changed, 77 insertions(+), 57 deletions(-) diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h index ab912c49334f..c36db6dc2a65 100644 --- a/include/linux/list_lru.h +++ b/include/linux/list_lru.h @@ -32,14 +32,15 @@ struct list_lru_one { }; struct list_lru_per_memcg { + struct rcu_head rcu; /* array of per cgroup per node lists, indexed by node id */ - struct list_lru_one node[0]; + struct list_lru_one node[]; }; struct list_lru_memcg { struct rcu_head rcu; /* array of per cgroup lists, indexed by memcg_cache_id */ - struct list_lru_per_memcg *mlru[]; + struct list_lru_per_memcg __rcu *mlru[]; }; struct list_lru_node { @@ -77,7 +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(int src_idx, struct mem_cgroup *dst_memcg); +void memcg_drain_all_list_lrus(struct mem_cgroup *src, struct mem_cgroup *dst); /** * 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 bffa80527723..fc938d8ff48f 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -60,8 +60,12 @@ list_lru_from_memcg_idx(struct list_lru *lru, int nid, int idx) * from relocation (see memcg_update_list_lru). */ mlrus = rcu_dereference_check(lru->mlrus, lockdep_is_held(&nlru->lock)); - if (mlrus && idx >= 0) - return &mlrus->mlru[idx]->node[nid]; + if (mlrus && idx >= 0) { + struct list_lru_per_memcg *mlru; + + mlru = rcu_dereference_check(mlrus->mlru[idx], true); + return mlru ? &mlru->node[nid] : NULL; + } return &nlru->lru; } @@ -188,7 +192,7 @@ unsigned long list_lru_count_one(struct list_lru *lru, rcu_read_lock(); l = list_lru_from_memcg_idx(lru, nid, memcg_cache_id(memcg)); - count = READ_ONCE(l->nr_items); + count = l ? READ_ONCE(l->nr_items) : 0; rcu_read_unlock(); if (unlikely(count < 0)) @@ -217,8 +221,11 @@ __list_lru_walk_one(struct list_lru *lru, int nid, int memcg_idx, struct list_head *item, *n; unsigned long isolated = 0; - l = list_lru_from_memcg_idx(lru, nid, memcg_idx); restart: + l = list_lru_from_memcg_idx(lru, nid, memcg_idx); + if (!l) + goto out; + list_for_each_safe(item, n, &l->list) { enum lru_status ret; @@ -262,6 +269,7 @@ __list_lru_walk_one(struct list_lru *lru, int nid, int memcg_idx, BUG(); } } +out: return isolated; } @@ -354,20 +362,25 @@ static struct list_lru_per_memcg *memcg_init_list_lru_one(gfp_t gfp) return mlru; } -static int memcg_init_list_lru_range(struct list_lru_memcg *mlrus, - int begin, int end) +static void memcg_list_lru_free(struct list_lru *lru, int src_idx) { - int i; + struct list_lru_memcg *mlrus; + struct list_lru_per_memcg *mlru; - for (i = begin; i < end; i++) { - mlrus->mlru[i] = memcg_init_list_lru_one(GFP_KERNEL); - if (!mlrus->mlru[i]) - goto fail; - } - return 0; -fail: - memcg_destroy_list_lru_range(mlrus, begin, i); - return -ENOMEM; + spin_lock_irq(&lru->lock); + mlrus = rcu_dereference_protected(lru->mlrus, true); + mlru = rcu_dereference_protected(mlrus->mlru[src_idx], true); + rcu_assign_pointer(mlrus->mlru[src_idx], NULL); + spin_unlock_irq(&lru->lock); + + /* + * The __list_lru_walk_one() can walk the list of this node. + * We need kvfree_rcu() here. And the walking of the list + * is under lru->node[nid]->lock, which can serve as a RCU + * read-side critical section. + */ + if (mlru) + kvfree_rcu(mlru, rcu); } static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) @@ -381,14 +394,10 @@ static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) spin_lock_init(&lru->lock); - mlrus = kvmalloc(struct_size(mlrus, mlru, size), GFP_KERNEL); + mlrus = kvzalloc(struct_size(mlrus, mlru, size), GFP_KERNEL); if (!mlrus) return -ENOMEM; - if (memcg_init_list_lru_range(mlrus, 0, size)) { - kvfree(mlrus); - return -ENOMEM; - } RCU_INIT_POINTER(lru->mlrus, mlrus); return 0; @@ -422,13 +431,9 @@ static int memcg_update_list_lru(struct list_lru *lru, int old_size, int new_siz if (!new) return -ENOMEM; - if (memcg_init_list_lru_range(new, old_size, new_size)) { - kvfree(new); - return -ENOMEM; - } - spin_lock_irq(&lru->lock); memcpy(&new->mlru, &old->mlru, flex_array_size(new, mlru, old_size)); + memset(&new->mlru[old_size], 0, flex_array_size(new, mlru, new_size - old_size)); rcu_assign_pointer(lru->mlrus, new); spin_unlock_irq(&lru->lock); @@ -436,20 +441,6 @@ static int memcg_update_list_lru(struct list_lru *lru, int old_size, int new_siz return 0; } -static void memcg_cancel_update_list_lru(struct list_lru *lru, - int old_size, int new_size) -{ - struct list_lru_memcg *mlrus; - - mlrus = rcu_dereference_protected(lru->mlrus, - lockdep_is_held(&list_lrus_mutex)); - /* - * Do not bother shrinking the array back to the old size, because we - * cannot handle allocation failures here. - */ - memcg_destroy_list_lru_range(mlrus, old_size, new_size); -} - int memcg_update_all_list_lrus(int new_size) { int ret = 0; @@ -460,15 +451,10 @@ int memcg_update_all_list_lrus(int new_size) list_for_each_entry(lru, &memcg_list_lrus, list) { ret = memcg_update_list_lru(lru, old_size, new_size); if (ret) - goto fail; + break; } -out: mutex_unlock(&list_lrus_mutex); return ret; -fail: - list_for_each_entry_continue_reverse(lru, &memcg_list_lrus, list) - memcg_cancel_update_list_lru(lru, old_size, new_size); - goto out; } static void memcg_drain_list_lru_node(struct list_lru *lru, int nid, @@ -485,6 +471,8 @@ static void memcg_drain_list_lru_node(struct list_lru *lru, int nid, spin_lock_irq(&nlru->lock); src = list_lru_from_memcg_idx(lru, nid, src_idx); + if (!src) + goto out; dst = list_lru_from_memcg_idx(lru, nid, dst_idx); list_splice_init(&src->list, &dst->list); @@ -494,7 +482,7 @@ static void memcg_drain_list_lru_node(struct list_lru *lru, int nid, set_shrinker_bit(dst_memcg, nid, lru_shrinker_id(lru)); src->nr_items = 0; } - +out: spin_unlock_irq(&nlru->lock); } @@ -505,15 +493,41 @@ static void memcg_drain_list_lru(struct list_lru *lru, for_each_node(i) memcg_drain_list_lru_node(lru, i, src_idx, dst_memcg); + + memcg_list_lru_free(lru, src_idx); } -void memcg_drain_all_list_lrus(int src_idx, struct mem_cgroup *dst_memcg) +void memcg_drain_all_list_lrus(struct mem_cgroup *src, struct mem_cgroup *dst) { + struct cgroup_subsys_state *css; struct list_lru *lru; + int src_idx = src->kmemcg_id; + + /* + * Change kmemcg_id of this cgroup and all its descendants to the + * parent's id, and then move all entries from this cgroup's list_lrus + * to ones of the parent. + * + * After we have finished, all list_lrus corresponding to this cgroup + * are guaranteed to remain empty. So we can safely free this cgroup's + * list lrus in memcg_list_lru_free(). + * + * Changing ->kmemcg_id to the parent can prevent memcg_list_lru_alloc() + * from allocating list lrus for this cgroup after memcg_list_lru_free() + * call. + */ + rcu_read_lock(); + css_for_each_descendant_pre(css, &src->css) { + struct mem_cgroup *memcg; + + memcg = mem_cgroup_from_css(css); + memcg->kmemcg_id = dst->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); + memcg_drain_list_lru(lru, src_idx, dst); mutex_unlock(&list_lrus_mutex); } @@ -528,7 +542,7 @@ static bool memcg_list_lru_allocated(struct mem_cgroup *memcg, return true; rcu_read_lock(); - allocated = !!rcu_dereference(lru->mlrus)->mlru[idx]; + allocated = !!rcu_access_pointer(rcu_dereference(lru->mlrus)->mlru[idx]); rcu_read_unlock(); return allocated; @@ -576,11 +590,12 @@ int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, mlrus = rcu_dereference_protected(lru->mlrus, true); while (i--) { int index = table[i].memcg->kmemcg_id; + struct list_lru_per_memcg *mlru = table[i].mlru; - if (mlrus->mlru[index]) - kfree(table[i].mlru); + if (index < 0 || rcu_dereference_protected(mlrus->mlru[index], true)) + kfree(mlru); else - mlrus->mlru[index] = table[i].mlru; + rcu_assign_pointer(mlrus->mlru[index], mlru); } spin_unlock_irqrestore(&lru->lock, flags); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ec7a62f39326..94d8f742c32e 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3643,6 +3643,10 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg) memcg_reparent_objcgs(memcg, parent); + /* + * memcg_drain_all_list_lrus() can change memcg->kmemcg_id. + * Cache it to local @kmemcg_id. + */ kmemcg_id = memcg->kmemcg_id; /* @@ -3651,7 +3655,7 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg) * The ordering is imposed by list_lru_node->lock taken by * memcg_drain_all_list_lrus(). */ - memcg_drain_all_list_lrus(kmemcg_id, parent); + memcg_drain_all_list_lrus(memcg, parent); memcg_free_cache_id(kmemcg_id); } From patchwork Mon Dec 20 08:56:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687403 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 498D6C4332F for ; Mon, 20 Dec 2021 08:59:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232129AbhLTI7P (ORCPT ); Mon, 20 Dec 2021 03:59:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230009AbhLTI7O (ORCPT ); Mon, 20 Dec 2021 03:59:14 -0500 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE398C061574 for ; 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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 --- include/linux/list_lru.h | 2 +- mm/list_lru.c | 24 ++++++++++++------------ mm/memcontrol.c | 6 +++--- 3 files changed, 16 insertions(+), 16 deletions(-) diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h index c36db6dc2a65..4b00fd8cb373 100644 --- a/include/linux/list_lru.h +++ b/include/linux/list_lru.h @@ -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 diff --git a/mm/list_lru.c b/mm/list_lru.c index fc938d8ff48f..488dacd1f8ff 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -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 @@ 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, 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); } diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 94d8f742c32e..a19b1a1c8ea9 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3644,7 +3644,7 @@ 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; @@ -3653,9 +3653,9 @@ 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); } From patchwork Mon Dec 20 08:56:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687405 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CA1F3C4332F for ; Mon, 20 Dec 2021 08:59:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232280AbhLTI70 (ORCPT ); Mon, 20 Dec 2021 03:59:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232645AbhLTI7Z (ORCPT ); Mon, 20 Dec 2021 03:59:25 -0500 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AB95C06173E for ; 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When we decrease the number containers, the size of the array will not be shrinked. It is not scalable. The xarray is a good choice for this case. We can save a lot of memory when there are tens of thousands continers in the system. If we use xarray, we also can remove the logic code of resizing array, which can simplify the code. Signed-off-by: Muchun Song --- include/linux/list_lru.h | 13 +-- include/linux/memcontrol.h | 23 ------ mm/list_lru.c | 202 +++++++++++++++------------------------------ mm/memcontrol.c | 77 ++--------------- 4 files changed, 73 insertions(+), 242 deletions(-) diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h index 4b00fd8cb373..572c263561ac 100644 --- a/include/linux/list_lru.h +++ b/include/linux/list_lru.h @@ -11,6 +11,7 @@ #include #include #include +#include struct mem_cgroup; @@ -37,12 +38,6 @@ struct list_lru_per_memcg { struct list_lru_one node[]; }; -struct list_lru_memcg { - struct rcu_head rcu; - /* array of per cgroup lists, indexed by memcg_cache_id */ - struct list_lru_per_memcg __rcu *mlru[]; -}; - struct list_lru_node { /* protects all lists on the node, including per cgroup */ spinlock_t lock; @@ -57,10 +52,7 @@ struct list_lru { struct list_head list; int shrinker_id; bool memcg_aware; - /* protects ->mlrus->mlru[i] */ - spinlock_t lock; - /* for cgroup aware lrus points to per cgroup lists, otherwise NULL */ - struct list_lru_memcg __rcu *mlrus; + struct xarray xa; #endif }; @@ -77,7 +69,6 @@ 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_reparent_list_lrus(struct mem_cgroup *memcg, struct mem_cgroup *parent); /** diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 561ba47760db..3fc437162add 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1711,18 +1711,6 @@ void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); extern struct static_key_false memcg_kmem_enabled_key; -extern int memcg_nr_cache_ids; -void memcg_get_cache_ids(void); -void memcg_put_cache_ids(void); - -/* - * Helper macro to loop through all memcg-specific caches. Callers must still - * check if the cache is valid (it is either valid or NULL). - * the slab_mutex must be held when looping through those caches - */ -#define for_each_memcg_cache_index(_idx) \ - for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) - static inline bool memcg_kmem_enabled(void) { return static_branch_likely(&memcg_kmem_enabled_key); @@ -1779,9 +1767,6 @@ static inline void __memcg_kmem_uncharge_page(struct page *page, int order) { } -#define for_each_memcg_cache_index(_idx) \ - for (; NULL; ) - static inline bool memcg_kmem_enabled(void) { return false; @@ -1792,14 +1777,6 @@ static inline int memcg_cache_id(struct mem_cgroup *memcg) return -1; } -static inline void memcg_get_cache_ids(void) -{ -} - -static inline void memcg_put_cache_ids(void) -{ -} - static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) { return NULL; diff --git a/mm/list_lru.c b/mm/list_lru.c index 488dacd1f8ff..8dc1dabb9f05 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -52,21 +52,12 @@ static int lru_shrinker_id(struct list_lru *lru) static inline struct list_lru_one * list_lru_from_memcg_idx(struct list_lru *lru, int nid, int idx) { - struct list_lru_memcg *mlrus; - struct list_lru_node *nlru = &lru->node[nid]; + if (list_lru_memcg_aware(lru) && idx >= 0) { + struct list_lru_per_memcg *mlru = xa_load(&lru->xa, idx); - /* - * Either lock or RCU protects the array of per cgroup lists - * from relocation (see memcg_update_list_lru). - */ - mlrus = rcu_dereference_check(lru->mlrus, lockdep_is_held(&nlru->lock)); - if (mlrus && idx >= 0) { - struct list_lru_per_memcg *mlru; - - mlru = rcu_dereference_check(mlrus->mlru[idx], true); return mlru ? &mlru->node[nid] : NULL; } - return &nlru->lru; + return &lru->node[nid].lru; } static inline struct list_lru_one * @@ -77,7 +68,7 @@ list_lru_from_kmem(struct list_lru *lru, int nid, void *ptr, struct list_lru_one *l = &nlru->lru; struct mem_cgroup *memcg = NULL; - if (!lru->mlrus) + if (!list_lru_memcg_aware(lru)) goto out; memcg = mem_cgroup_from_obj(ptr); @@ -309,16 +300,20 @@ unsigned long list_lru_walk_node(struct list_lru *lru, int nid, unsigned long *nr_to_walk) { long isolated = 0; - int memcg_idx; isolated += list_lru_walk_one(lru, nid, NULL, isolate, cb_arg, nr_to_walk); + +#ifdef CONFIG_MEMCG_KMEM if (*nr_to_walk > 0 && list_lru_memcg_aware(lru)) { - for_each_memcg_cache_index(memcg_idx) { + struct list_lru_per_memcg *mlru; + unsigned long index; + + xa_for_each(&lru->xa, index, mlru) { struct list_lru_node *nlru = &lru->node[nid]; spin_lock(&nlru->lock); - isolated += __list_lru_walk_one(lru, nid, memcg_idx, + isolated += __list_lru_walk_one(lru, nid, index, isolate, cb_arg, nr_to_walk); spin_unlock(&nlru->lock); @@ -327,6 +322,8 @@ unsigned long list_lru_walk_node(struct list_lru *lru, int nid, break; } } +#endif + return isolated; } EXPORT_SYMBOL_GPL(list_lru_walk_node); @@ -338,15 +335,6 @@ static void init_one_lru(struct list_lru_one *l) } #ifdef CONFIG_MEMCG_KMEM -static void memcg_destroy_list_lru_range(struct list_lru_memcg *mlrus, - int begin, int end) -{ - int i; - - for (i = begin; i < end; i++) - kfree(mlrus->mlru[i]); -} - static struct list_lru_per_memcg *memcg_init_list_lru_one(gfp_t gfp) { int nid; @@ -364,14 +352,7 @@ static struct list_lru_per_memcg *memcg_init_list_lru_one(gfp_t gfp) static void memcg_list_lru_free(struct list_lru *lru, int src_idx) { - struct list_lru_memcg *mlrus; - struct list_lru_per_memcg *mlru; - - spin_lock_irq(&lru->lock); - mlrus = rcu_dereference_protected(lru->mlrus, true); - mlru = rcu_dereference_protected(mlrus->mlru[src_idx], true); - rcu_assign_pointer(mlrus->mlru[src_idx], NULL); - spin_unlock_irq(&lru->lock); + struct list_lru_per_memcg *mlru = xa_erase_irq(&lru->xa, src_idx); /* * The __list_lru_walk_one() can walk the list of this node. @@ -383,78 +364,27 @@ static void memcg_list_lru_free(struct list_lru *lru, int src_idx) kvfree_rcu(mlru, rcu); } -static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) +static inline void memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) { - struct list_lru_memcg *mlrus; - int size = memcg_nr_cache_ids; - + if (memcg_aware) + xa_init_flags(&lru->xa, XA_FLAGS_LOCK_IRQ); lru->memcg_aware = memcg_aware; - if (!memcg_aware) - return 0; - - spin_lock_init(&lru->lock); - - mlrus = kvzalloc(struct_size(mlrus, mlru, size), GFP_KERNEL); - if (!mlrus) - return -ENOMEM; - - RCU_INIT_POINTER(lru->mlrus, mlrus); - - return 0; } static void memcg_destroy_list_lru(struct list_lru *lru) { - struct list_lru_memcg *mlrus; + XA_STATE(xas, &lru->xa, 0); + struct list_lru_per_memcg *mlru; if (!list_lru_memcg_aware(lru)) return; - /* - * This is called when shrinker has already been unregistered, - * and nobody can use it. So, there is no need to use kvfree_rcu(). - */ - mlrus = rcu_dereference_protected(lru->mlrus, true); - memcg_destroy_list_lru_range(mlrus, 0, memcg_nr_cache_ids); - kvfree(mlrus); -} - -static int memcg_update_list_lru(struct list_lru *lru, int old_size, int new_size) -{ - struct list_lru_memcg *old, *new; - - BUG_ON(old_size > new_size); - - old = rcu_dereference_protected(lru->mlrus, - lockdep_is_held(&list_lrus_mutex)); - new = kvmalloc(struct_size(new, mlru, new_size), GFP_KERNEL); - if (!new) - return -ENOMEM; - - spin_lock_irq(&lru->lock); - memcpy(&new->mlru, &old->mlru, flex_array_size(new, mlru, old_size)); - memset(&new->mlru[old_size], 0, flex_array_size(new, mlru, new_size - old_size)); - rcu_assign_pointer(lru->mlrus, new); - spin_unlock_irq(&lru->lock); - - kvfree_rcu(old, rcu); - return 0; -} - -int memcg_update_all_list_lrus(int new_size) -{ - int ret = 0; - struct list_lru *lru; - int old_size = memcg_nr_cache_ids; - - mutex_lock(&list_lrus_mutex); - list_for_each_entry(lru, &memcg_list_lrus, list) { - ret = memcg_update_list_lru(lru, old_size, new_size); - if (ret) - break; + xas_lock_irq(&xas); + xas_for_each(&xas, mlru, ULONG_MAX) { + kfree(mlru); + xas_store(&xas, NULL); } - mutex_unlock(&list_lrus_mutex); - return ret; + xas_unlock_irq(&xas); } static void memcg_reparent_list_lru_node(struct list_lru *lru, int nid, @@ -521,7 +451,7 @@ void memcg_reparent_list_lrus(struct mem_cgroup *memcg, struct mem_cgroup *paren struct mem_cgroup *child; child = mem_cgroup_from_css(css); - child->kmemcg_id = parent->kmemcg_id; + WRITE_ONCE(child->kmemcg_id, parent->kmemcg_id); } rcu_read_unlock(); @@ -531,21 +461,12 @@ void memcg_reparent_list_lrus(struct mem_cgroup *memcg, struct mem_cgroup *paren mutex_unlock(&list_lrus_mutex); } -static bool memcg_list_lru_allocated(struct mem_cgroup *memcg, - struct list_lru *lru) +static inline bool memcg_list_lru_allocated(struct mem_cgroup *memcg, + struct list_lru *lru) { - bool allocated; - int idx; + int idx = memcg->kmemcg_id; - idx = memcg->kmemcg_id; - if (unlikely(idx < 0)) - return true; - - rcu_read_lock(); - allocated = !!rcu_access_pointer(rcu_dereference(lru->mlrus)->mlru[idx]); - rcu_read_unlock(); - - return allocated; + return idx < 0 || xa_load(&lru->xa, idx); } int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, @@ -558,6 +479,7 @@ int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, struct list_lru_per_memcg *mlru; struct mem_cgroup *memcg; } *table; + XA_STATE(xas, &lru->xa, 0); if (!list_lru_memcg_aware(lru) || memcg_list_lru_allocated(memcg, lru)) return 0; @@ -586,27 +508,48 @@ int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, } } - spin_lock_irqsave(&lru->lock, flags); - mlrus = rcu_dereference_protected(lru->mlrus, true); + xas_lock_irqsave(&xas, flags); while (i--) { - int index = table[i].memcg->kmemcg_id; + int index = READ_ONCE(table[i].memcg->kmemcg_id); struct list_lru_per_memcg *mlru = table[i].mlru; - if (index < 0 || rcu_dereference_protected(mlrus->mlru[index], true)) + xas_set(&xas, index); +retry: + if (unlikely(index < 0 || xas_error(&xas) || xas_load(&xas))) { kfree(mlru); - else - rcu_assign_pointer(mlrus->mlru[index], mlru); + } else { + xas_store(&xas, mlru); + if (xas_error(&xas) == -ENOMEM) { + xas_unlock_irqrestore(&xas, flags); + if (xas_nomem(&xas, gfp)) + xas_set_err(&xas, 0); + xas_lock_irqsave(&xas, flags); + /* + * The xas lock has been released, this memcg + * can be reparented before us. So reload + * memcg id. More details see the comments + * in memcg_reparent_list_lrus(). + */ + index = READ_ONCE(table[i].memcg->kmemcg_id); + if (index < 0) + xas_set_err(&xas, 0); + else if (!xas_error(&xas) && index != xas.xa_index) + xas_set(&xas, index); + goto retry; + } + } } - spin_unlock_irqrestore(&lru->lock, flags); - + /* xas_nomem() is used to free memory instead of memory allocation. */ + if (xas.xa_alloc) + xas_nomem(&xas, gfp); + xas_unlock_irqrestore(&xas, flags); kfree(table); - return 0; + return xas_error(&xas); } #else -static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) +static inline void memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) { - return 0; } static void memcg_destroy_list_lru(struct list_lru *lru) @@ -618,7 +561,6 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, struct lock_class_key *key, struct shrinker *shrinker) { int i; - int err = -ENOMEM; #ifdef CONFIG_MEMCG_KMEM if (shrinker) @@ -626,11 +568,10 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, else lru->shrinker_id = -1; #endif - memcg_get_cache_ids(); lru->node = kcalloc(nr_node_ids, sizeof(*lru->node), GFP_KERNEL); if (!lru->node) - goto out; + return -ENOMEM; for_each_node(i) { spin_lock_init(&lru->node[i].lock); @@ -639,18 +580,10 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, init_one_lru(&lru->node[i].lru); } - err = memcg_init_list_lru(lru, memcg_aware); - if (err) { - kfree(lru->node); - /* Do this so a list_lru_destroy() doesn't crash: */ - lru->node = NULL; - goto out; - } - + memcg_init_list_lru(lru, memcg_aware); list_lru_register(lru); -out: - memcg_put_cache_ids(); - return err; + + return 0; } EXPORT_SYMBOL_GPL(__list_lru_init); @@ -660,8 +593,6 @@ void list_lru_destroy(struct list_lru *lru) if (!lru->node) return; - memcg_get_cache_ids(); - list_lru_unregister(lru); memcg_destroy_list_lru(lru); @@ -671,6 +602,5 @@ void list_lru_destroy(struct list_lru *lru) #ifdef CONFIG_MEMCG_KMEM lru->shrinker_id = -1; #endif - memcg_put_cache_ids(); } EXPORT_SYMBOL_GPL(list_lru_destroy); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a19b1a1c8ea9..28d6d2564f9d 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -351,42 +351,17 @@ static void memcg_reparent_objcgs(struct mem_cgroup *memcg, * This will be used as a shrinker list's index. * The main reason for not using cgroup id for this: * this works better in sparse environments, where we have a lot of memcgs, - * but only a few kmem-limited. Or also, if we have, for instance, 200 - * memcgs, and none but the 200th is kmem-limited, we'd have to have a - * 200 entry array for that. - * - * The current size of the caches array is stored in memcg_nr_cache_ids. It - * will double each time we have to increase it. + * but only a few kmem-limited. */ static DEFINE_IDA(memcg_cache_ida); -int memcg_nr_cache_ids; - -/* Protects memcg_nr_cache_ids */ -static DECLARE_RWSEM(memcg_cache_ids_sem); - -void memcg_get_cache_ids(void) -{ - down_read(&memcg_cache_ids_sem); -} - -void memcg_put_cache_ids(void) -{ - up_read(&memcg_cache_ids_sem); -} /* - * MIN_SIZE is different than 1, because we would like to avoid going through - * the alloc/free process all the time. In a small machine, 4 kmem-limited - * cgroups is a reasonable guess. In the future, it could be a parameter or - * tunable, but that is strictly not necessary. - * * MAX_SIZE should be as large as the number of cgrp_ids. Ideally, we could get * this constant directly from cgroup, but it is understandable that this is * better kept as an internal representation in cgroup.c. In any case, the * cgrp_id space is not getting any smaller, and we don't have to necessarily * increase ours as well if it increases. */ -#define MEMCG_CACHES_MIN_SIZE 4 #define MEMCG_CACHES_MAX_SIZE MEM_CGROUP_ID_MAX /* @@ -2910,49 +2885,6 @@ __always_inline struct obj_cgroup *get_obj_cgroup_from_current(void) return objcg; } -static int memcg_alloc_cache_id(void) -{ - int id, size; - int err; - - id = ida_simple_get(&memcg_cache_ida, - 0, MEMCG_CACHES_MAX_SIZE, GFP_KERNEL); - if (id < 0) - return id; - - if (id < memcg_nr_cache_ids) - return id; - - /* - * There's no space for the new id in memcg_caches arrays, - * so we have to grow them. - */ - down_write(&memcg_cache_ids_sem); - - size = 2 * (id + 1); - if (size < MEMCG_CACHES_MIN_SIZE) - size = MEMCG_CACHES_MIN_SIZE; - else if (size > MEMCG_CACHES_MAX_SIZE) - size = MEMCG_CACHES_MAX_SIZE; - - err = memcg_update_all_list_lrus(size); - if (!err) - memcg_nr_cache_ids = size; - - up_write(&memcg_cache_ids_sem); - - if (err) { - ida_simple_remove(&memcg_cache_ida, id); - return err; - } - return id; -} - -static void memcg_free_cache_id(int id) -{ - ida_simple_remove(&memcg_cache_ida, id); -} - /* * obj_cgroup_uncharge_pages: uncharge a number of kernel pages from a objcg * @objcg: object cgroup to uncharge @@ -3607,13 +3539,14 @@ static int memcg_online_kmem(struct mem_cgroup *memcg) if (unlikely(mem_cgroup_is_root(memcg))) return 0; - memcg_id = memcg_alloc_cache_id(); + memcg_id = ida_alloc_max(&memcg_cache_ida, MEMCG_CACHES_MAX_SIZE - 1, + GFP_KERNEL); if (memcg_id < 0) return memcg_id; objcg = obj_cgroup_alloc(); if (!objcg) { - memcg_free_cache_id(memcg_id); + ida_free(&memcg_cache_ida, memcg_id); return -ENOMEM; } objcg->memcg = memcg; @@ -3657,7 +3590,7 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg) */ memcg_reparent_list_lrus(memcg, parent); - memcg_free_cache_id(kmemcg_id); + ida_free(&memcg_cache_ida, kmemcg_id); } #else static int memcg_online_kmem(struct mem_cgroup *memcg) From patchwork Mon Dec 20 08:56:46 2021 Content-Type: text/plain; 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Mon, 20 Dec 2021 00:59:35 -0800 (PST) Received: from localhost.localdomain ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id m11sm18441647pfk.27.2021.12.20.00.59.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Dec 2021 00:59:34 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 13/16] mm: memcontrol: reuse memory cgroup ID for kmem ID Date: Mon, 20 Dec 2021 16:56:46 +0800 Message-Id: <20211220085649.8196-14-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org There are two idrs being used by memory cgroup, one is for kmem ID, another is for memory cgroup ID. The maximum ID of both is 64Ki. Both of them can limit the total number of memory cgroups. Actually, we can reuse memory cgroup ID for kmem ID to simplify the code. Signed-off-by: Muchun Song --- include/linux/memcontrol.h | 1 + mm/memcontrol.c | 46 ++++++++-------------------------------------- 2 files changed, 9 insertions(+), 38 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 3fc437162add..7b472f805d77 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -56,6 +56,7 @@ struct mem_cgroup_reclaim_cookie { #ifdef CONFIG_MEMCG #define MEM_CGROUP_ID_SHIFT 16 +#define MEM_CGROUP_ID_MIN 1 #define MEM_CGROUP_ID_MAX USHRT_MAX struct mem_cgroup_id { diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 28d6d2564f9d..04f75055f518 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -348,23 +348,6 @@ static void memcg_reparent_objcgs(struct mem_cgroup *memcg, } /* - * This will be used as a shrinker list's index. - * The main reason for not using cgroup id for this: - * this works better in sparse environments, where we have a lot of memcgs, - * but only a few kmem-limited. - */ -static DEFINE_IDA(memcg_cache_ida); - -/* - * MAX_SIZE should be as large as the number of cgrp_ids. Ideally, we could get - * this constant directly from cgroup, but it is understandable that this is - * better kept as an internal representation in cgroup.c. In any case, the - * cgrp_id space is not getting any smaller, and we don't have to necessarily - * increase ours as well if it increases. - */ -#define MEMCG_CACHES_MAX_SIZE MEM_CGROUP_ID_MAX - -/* * A lot of the calls to the cache allocation functions are expected to be * inlined by the compiler. Since the calls to memcg_slab_pre_alloc_hook() are * conditional to this static branch, we'll have to allow modules that does @@ -3528,10 +3511,12 @@ static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css, } #ifdef CONFIG_MEMCG_KMEM +#define MEM_CGROUP_KMEM_ID_MIN -1 +#define MEM_CGROUP_ID_DIFF (MEM_CGROUP_ID_MIN - MEM_CGROUP_KMEM_ID_MIN) + static int memcg_online_kmem(struct mem_cgroup *memcg) { struct obj_cgroup *objcg; - int memcg_id; if (cgroup_memory_nokmem) return 0; @@ -3539,22 +3524,16 @@ static int memcg_online_kmem(struct mem_cgroup *memcg) if (unlikely(mem_cgroup_is_root(memcg))) return 0; - memcg_id = ida_alloc_max(&memcg_cache_ida, MEMCG_CACHES_MAX_SIZE - 1, - GFP_KERNEL); - if (memcg_id < 0) - return memcg_id; - objcg = obj_cgroup_alloc(); - if (!objcg) { - ida_free(&memcg_cache_ida, memcg_id); + if (!objcg) return -ENOMEM; - } + objcg->memcg = memcg; rcu_assign_pointer(memcg->objcg, objcg); static_branch_enable(&memcg_kmem_enabled_key); - memcg->kmemcg_id = memcg_id; + memcg->kmemcg_id = memcg->id.id - MEM_CGROUP_ID_DIFF; return 0; } @@ -3562,7 +3541,6 @@ static int memcg_online_kmem(struct mem_cgroup *memcg) static void memcg_offline_kmem(struct mem_cgroup *memcg) { struct mem_cgroup *parent; - int kmemcg_id; if (cgroup_memory_nokmem) return; @@ -3577,20 +3555,12 @@ static void memcg_offline_kmem(struct mem_cgroup *memcg) memcg_reparent_objcgs(memcg, parent); /* - * memcg_reparent_list_lrus() can change memcg->kmemcg_id. - * Cache it to local @kmemcg_id. - */ - kmemcg_id = memcg->kmemcg_id; - - /* * 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_reparent_list_lrus(). */ memcg_reparent_list_lrus(memcg, parent); - - ida_free(&memcg_cache_ida, kmemcg_id); } #else static int memcg_online_kmem(struct mem_cgroup *memcg) @@ -5043,7 +5013,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void) return ERR_PTR(error); memcg->id.id = idr_alloc(&mem_cgroup_idr, NULL, - 1, MEM_CGROUP_ID_MAX, + MEM_CGROUP_ID_MIN, MEM_CGROUP_ID_MAX, GFP_KERNEL); if (memcg->id.id < 0) { error = memcg->id.id; @@ -5071,7 +5041,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void) spin_lock_init(&memcg->event_list_lock); memcg->socket_pressure = jiffies; #ifdef CONFIG_MEMCG_KMEM - memcg->kmemcg_id = -1; + memcg->kmemcg_id = MEM_CGROUP_KMEM_ID_MIN; INIT_LIST_HEAD(&memcg->objcg_list); #endif #ifdef CONFIG_CGROUP_WRITEBACK From patchwork Mon Dec 20 08:56:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687407 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99627C433F5 for ; Mon, 20 Dec 2021 08:59:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232516AbhLTI7r (ORCPT ); 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Mon, 20 Dec 2021 00:59:46 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 14/16] mm: memcontrol: fix cannot alloc the maximum memcg ID Date: Mon, 20 Dec 2021 16:56:47 +0800 Message-Id: <20211220085649.8196-15-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The idr_alloc() does not include @max ID. So in the current implementation, the maximum memcg ID is 65534 instead of 65535. It seems a bug. So fix this. Signed-off-by: Muchun Song --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 04f75055f518..fdd0007554a0 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5013,7 +5013,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void) return ERR_PTR(error); memcg->id.id = idr_alloc(&mem_cgroup_idr, NULL, - MEM_CGROUP_ID_MIN, MEM_CGROUP_ID_MAX, + MEM_CGROUP_ID_MIN, MEM_CGROUP_ID_MAX + 1, GFP_KERNEL); if (memcg->id.id < 0) { error = memcg->id.id; From patchwork Mon Dec 20 08:56:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687409 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31648C4332F for ; Mon, 20 Dec 2021 09:00:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234963AbhLTI76 (ORCPT ); Mon, 20 Dec 2021 03:59:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234072AbhLTI76 (ORCPT ); Mon, 20 Dec 2021 03:59:58 -0500 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AEB6CC06173E for ; Mon, 20 Dec 2021 00:59:57 -0800 (PST) Received: by mail-pj1-x102e.google.com with SMTP id y16-20020a17090a6c9000b001b13ffaa625so9723329pjj.2 for ; Mon, 20 Dec 2021 00:59:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=O7Mg/f9nLeyIWPXNcJvDRJ+Jd7WL7Il017lo2NLhARI=; b=AObXVaMCAZp1YSpU+N0pd6b07yZsOB0gSHwjRit7kLVYIZYiRfeQ/spzZXewRhTyMr 9zaGnTPCpA/zmFjGnY68cgU+xL9qQL2htZp6Zqeie2XKwUyKx+VcuYh2HoGW5CyLZ3tl 6+l07WxDwkKR8yn284XkR8CoQyeCnFyTm49lYj8Vbe8ajOJxOSJOwAwp/x0vmAyNVmnj xQlZ64Oqvv4P6iAYhMcwyxRDd6nnNevokyhdHMcfYrW8fxUL8nLJXNGWZbPVETcy4pFO WjtaCCOEuv+cJ5O7aRdjkwL2gP/mrZnl5CdjsHZIOrJ8Ltn+Cp51WsJpIqNHM106kMNj 0/wQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=O7Mg/f9nLeyIWPXNcJvDRJ+Jd7WL7Il017lo2NLhARI=; b=WXFYll87c9p437tUkc2m9fBxGjCOYfYMgSLqi3/6duZrrCEFjGLbAROLOqtN2x5R2D uga9r24OQTgt6VeqDFGH1UdqPWvfTEwDhijq1bQrFp575IRWD7IQmKwHZHssKo7n7Gqn L2j7yP12VqxCUf2j/BLvzqthFYyfcrNe/NR5vTnJ/HRn/Fgx/ao4c7Zyy44ZOB3mvrYd gV0kA3aIsXtwtPY9i+fMRpFRdR6DLQOFFtWa9KNI/QBeatF+lsTWwW2LTCefRPXXaYCq vkzqutq20peDGpe4psEKz8Lzi/Yn2DtDWSHL5/HAFUgKQ9hlNd0LpjgGCpUSQvrH+nx2 8RGQ== X-Gm-Message-State: AOAM530nusKRBDJ7TZD6358hKzwmYwNM0hZmpKkEWmRtpCdEHTCx2Qrv ahY/St/qxi1Uezi7JPaASJ2GtQ== X-Google-Smtp-Source: ABdhPJxnxSChBfXQZtFai6mG8NPSe+Q2tN3yMmFqcabRYLbf40MvRwYGGO1kMR6ED42RJ5L/OKu9aw== X-Received: by 2002:a17:90a:d792:: with SMTP id z18mr1922586pju.182.1639990797245; Mon, 20 Dec 2021 00:59:57 -0800 (PST) Received: from localhost.localdomain ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id m11sm18441647pfk.27.2021.12.20.00.59.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Dec 2021 00:59:56 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 15/16] mm: list_lru: rename list_lru_per_memcg to list_lru_memcg Date: Mon, 20 Dec 2021 16:56:48 +0800 Message-Id: <20211220085649.8196-16-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The name of list_lru_memcg was occupied before and became free since last commit. Rename list_lru_per_memcg to list_lru_memcg since the name is brief. Signed-off-by: Muchun Song --- include/linux/list_lru.h | 2 +- mm/list_lru.c | 18 +++++++++--------- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h index 572c263561ac..b35968ee9fb5 100644 --- a/include/linux/list_lru.h +++ b/include/linux/list_lru.h @@ -32,7 +32,7 @@ struct list_lru_one { long nr_items; }; -struct list_lru_per_memcg { +struct list_lru_memcg { struct rcu_head rcu; /* array of per cgroup per node lists, indexed by node id */ struct list_lru_one node[]; diff --git a/mm/list_lru.c b/mm/list_lru.c index 8dc1dabb9f05..38f711e9b56e 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -53,7 +53,7 @@ static inline struct list_lru_one * list_lru_from_memcg_idx(struct list_lru *lru, int nid, int idx) { if (list_lru_memcg_aware(lru) && idx >= 0) { - struct list_lru_per_memcg *mlru = xa_load(&lru->xa, idx); + struct list_lru_memcg *mlru = xa_load(&lru->xa, idx); return mlru ? &mlru->node[nid] : NULL; } @@ -306,7 +306,7 @@ unsigned long list_lru_walk_node(struct list_lru *lru, int nid, #ifdef CONFIG_MEMCG_KMEM if (*nr_to_walk > 0 && list_lru_memcg_aware(lru)) { - struct list_lru_per_memcg *mlru; + struct list_lru_memcg *mlru; unsigned long index; xa_for_each(&lru->xa, index, mlru) { @@ -335,10 +335,10 @@ static void init_one_lru(struct list_lru_one *l) } #ifdef CONFIG_MEMCG_KMEM -static struct list_lru_per_memcg *memcg_init_list_lru_one(gfp_t gfp) +static struct list_lru_memcg *memcg_init_list_lru_one(gfp_t gfp) { int nid; - struct list_lru_per_memcg *mlru; + struct list_lru_memcg *mlru; mlru = kmalloc(struct_size(mlru, node, nr_node_ids), gfp); if (!mlru) @@ -352,7 +352,7 @@ static struct list_lru_per_memcg *memcg_init_list_lru_one(gfp_t gfp) static void memcg_list_lru_free(struct list_lru *lru, int src_idx) { - struct list_lru_per_memcg *mlru = xa_erase_irq(&lru->xa, src_idx); + struct list_lru_memcg *mlru = xa_erase_irq(&lru->xa, src_idx); /* * The __list_lru_walk_one() can walk the list of this node. @@ -374,7 +374,7 @@ static inline void memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) static void memcg_destroy_list_lru(struct list_lru *lru) { XA_STATE(xas, &lru->xa, 0); - struct list_lru_per_memcg *mlru; + struct list_lru_memcg *mlru; if (!list_lru_memcg_aware(lru)) return; @@ -476,7 +476,7 @@ int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, unsigned long flags; struct list_lru_memcg *mlrus; struct list_lru_memcg_table { - struct list_lru_per_memcg *mlru; + struct list_lru_memcg *mlru; struct mem_cgroup *memcg; } *table; XA_STATE(xas, &lru->xa, 0); @@ -492,7 +492,7 @@ int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, /* * Because the list_lru can be reparented to the parent cgroup's * list_lru, we should make sure that this cgroup and all its - * ancestors have allocated list_lru_per_memcg. + * ancestors have allocated list_lru_memcg. */ for (i = 0; memcg; memcg = parent_mem_cgroup(memcg), i++) { if (memcg_list_lru_allocated(memcg, lru)) @@ -511,7 +511,7 @@ int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru, xas_lock_irqsave(&xas, flags); while (i--) { int index = READ_ONCE(table[i].memcg->kmemcg_id); - struct list_lru_per_memcg *mlru = table[i].mlru; + struct list_lru_memcg *mlru = table[i].mlru; xas_set(&xas, index); retry: From patchwork Mon Dec 20 08:56:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12687411 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF44FC4332F for ; Mon, 20 Dec 2021 09:00:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235016AbhLTJAJ (ORCPT ); Mon, 20 Dec 2021 04:00:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235011AbhLTJAI (ORCPT ); Mon, 20 Dec 2021 04:00:08 -0500 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48223C06173F for ; 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bh=nj5bpOelDWsvGfc4yM7RxdUM4ftOW0E3SXCCNb4y4Rg=; b=pLTxtE1gKh6kbq1qOEegeakkbmOQwe7J4ojw73shvnJljijPwmRpejx4uvRth41SyT DpDwToAYobpBI6UId4Aob0lO/M38psNAOfU7uqifMnFZkzq2szPCusA4c+DKCDeD9BX6 H4nb9inX6tmkYAFM9Dh1CxQzc9YVxa0DqHZML9VqgDigVYxE3jh4oCjXje6Cno7rOFh7 mSkUq2qYSRkzIQSRiB1Ypbbr1oX5Zm/Zp8qw2vGYURFT3zotwlUTf78wpgHKmlVHN3Za /cFVuwLYXFOkSZmijFQZy1iXUgNLt63/oPWXRUdiig/Xs8VKE5CPsjn1CM0/qJWhBXI9 3vhw== X-Gm-Message-State: AOAM533kio6/TgT6L/uX7rb2416aGU+FNBxYkOwVHgr6D/+4E7GNU44Z hAJYi+k9FvOy+zZD6t5eOPBGsQ== X-Google-Smtp-Source: ABdhPJyyhJdQS5rF6GJ72AexnZCsiIgIk33FtW1YNTXCIkJoHk3+KGt6KtK30DfUdxLyN/PdvWmPkw== X-Received: by 2002:a17:90a:9907:: with SMTP id b7mr27398035pjp.137.1639990807737; Mon, 20 Dec 2021 01:00:07 -0800 (PST) Received: from localhost.localdomain ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id m11sm18441647pfk.27.2021.12.20.00.59.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Dec 2021 01:00:07 -0800 (PST) From: Muchun Song 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, jaegeuk@kernel.org, chao@kernel.org, kari.argillander@gmail.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, smuchun@gmail.com, Muchun Song Subject: [PATCH v5 16/16] mm: memcontrol: rename memcg_cache_id to memcg_kmem_id Date: Mon, 20 Dec 2021 16:56:49 +0800 Message-Id: <20211220085649.8196-17-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211220085649.8196-1-songmuchun@bytedance.com> References: <20211220085649.8196-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The memcg_cache_id() introduced by commit 2633d7a02823 ("slab/slub: consider a memcg parameter in kmem_create_cache") is used to index in the kmem_cache->memcg_params->memcg_caches array. Since kmem_cache->memcg_params.memcg_caches has been removed by commit 9855609bde03 ("mm: memcg/slab: use a single set of kmem_caches for all accounted allocations"). So the name does not need to reflect cache related. Just rename it to memcg_kmem_id. And it can reflect kmem related. Signed-off-by: Muchun Song --- include/linux/memcontrol.h | 4 ++-- mm/list_lru.c | 8 ++++---- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 7b472f805d77..94ed3a124191 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1735,7 +1735,7 @@ static inline void memcg_kmem_uncharge_page(struct page *page, int order) * A helper for accessing memcg's kmem_id, used for getting * corresponding LRU lists. */ -static inline int memcg_cache_id(struct mem_cgroup *memcg) +static inline int memcg_kmem_id(struct mem_cgroup *memcg) { return memcg ? memcg->kmemcg_id : -1; } @@ -1773,7 +1773,7 @@ static inline bool memcg_kmem_enabled(void) return false; } -static inline int memcg_cache_id(struct mem_cgroup *memcg) +static inline int memcg_kmem_id(struct mem_cgroup *memcg) { return -1; } diff --git a/mm/list_lru.c b/mm/list_lru.c index 38f711e9b56e..8b402373e965 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -75,7 +75,7 @@ list_lru_from_kmem(struct list_lru *lru, int nid, void *ptr, if (!memcg) goto out; - l = list_lru_from_memcg_idx(lru, nid, memcg_cache_id(memcg)); + l = list_lru_from_memcg_idx(lru, nid, memcg_kmem_id(memcg)); out: if (memcg_ptr) *memcg_ptr = memcg; @@ -182,7 +182,7 @@ unsigned long list_lru_count_one(struct list_lru *lru, long count; rcu_read_lock(); - l = list_lru_from_memcg_idx(lru, nid, memcg_cache_id(memcg)); + l = list_lru_from_memcg_idx(lru, nid, memcg_kmem_id(memcg)); count = l ? READ_ONCE(l->nr_items) : 0; rcu_read_unlock(); @@ -273,7 +273,7 @@ list_lru_walk_one(struct list_lru *lru, int nid, struct mem_cgroup *memcg, unsigned long ret; spin_lock(&nlru->lock); - ret = __list_lru_walk_one(lru, nid, memcg_cache_id(memcg), isolate, + ret = __list_lru_walk_one(lru, nid, memcg_kmem_id(memcg), isolate, cb_arg, nr_to_walk); spin_unlock(&nlru->lock); return ret; @@ -289,7 +289,7 @@ list_lru_walk_one_irq(struct list_lru *lru, int nid, struct mem_cgroup *memcg, unsigned long ret; spin_lock_irq(&nlru->lock); - ret = __list_lru_walk_one(lru, nid, memcg_cache_id(memcg), isolate, + ret = __list_lru_walk_one(lru, nid, memcg_kmem_id(memcg), isolate, cb_arg, nr_to_walk); spin_unlock_irq(&nlru->lock); return ret;