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Mon, 28 Feb 2022 04:23:50 -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, roman.gushchin@linux.dev, 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, vbabka@suse.cz 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 v6 11/16] mm: list_lru: rename memcg_drain_all_list_lrus to memcg_reparent_list_lrus Date: Mon, 28 Feb 2022 20:21:21 +0800 Message-Id: <20220228122126.37293-12-songmuchun@bytedance.com> X-Mailer: git-send-email 2.32.0 (Apple Git-132) In-Reply-To: <20220228122126.37293-1-songmuchun@bytedance.com> References: <20220228122126.37293-1-songmuchun@bytedance.com> MIME-Version: 1.0 X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: EB4EA4000E X-Rspam-User: Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=PmFMDGtf; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf01.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.216.47 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Stat-Signature: q6beutkyuhkx14xtq1pzwkf31qbn886m X-HE-Tag: 1646051031-872170 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The purpose of the memcg_drain_all_list_lrus() is list_lrus reparenting. It is very similar to memcg_reparent_objcgs(). Rename it to memcg_reparent_list_lrus() so that the name can more consistent with memcg_reparent_objcgs(). Signed-off-by: Muchun Song --- 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 c8d39d7fc2e5..87ee5b431c05 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3656,7 +3656,7 @@ 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; @@ -3665,9 +3665,9 @@ 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); }