From patchwork Thu Dec 17 03:43:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 11979063 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25063C2BB48 for ; Thu, 17 Dec 2020 03:47:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF46B23877 for ; Thu, 17 Dec 2020 03:47:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728824AbgLQDrg (ORCPT ); Wed, 16 Dec 2020 22:47:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728779AbgLQDrg (ORCPT ); Wed, 16 Dec 2020 22:47:36 -0500 Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23DD4C0619D2 for ; Wed, 16 Dec 2020 19:46:29 -0800 (PST) Received: by mail-pf1-x42f.google.com with SMTP id d2so18175605pfq.5 for ; Wed, 16 Dec 2020 19:46:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=p3OHjqKD6x4JCybHo/LDnqZ2DJrExSzBnbiuStXpNr8=; b=gNrD3FTQyEAeYIei7WvGyw9+CpWASIvUxWGkgRGWCKaevxWSwLYl80l46XILQxfms3 Kq0H/64myBzlRrDA2axWEhYble0/v/GmQpF2dBxpHmI7JMjPK0pe4XGhI/K2RIyfblNy I5Hv3MkiORMHb/en93POgbLuGGoZVI9xqB0swUgbPqNnIKC7CZxHOz7R0aduSiDYjiv9 h1yyeQzdOLfQ8E86PX5U0uFrzWxf8okIG5zyV2PfbBNkHJJZK2z7wph6WMcjA2Z0o/Sc Givi4tcZp7ggF0cKQOEmet7K/DiXNRfFIKzbs076wPiOR0Gvg48GtKD1iIm8xR5R9aaa 0m7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=p3OHjqKD6x4JCybHo/LDnqZ2DJrExSzBnbiuStXpNr8=; b=QUnLaAeCng/xXGabQZkvJ4YnfHqmBhjCK6g0YDzfcmjmoCvNKG8WHVwtI3Rs4M2dn0 Rm5MG2/frTFOVyoWU2y9+yx2dgde0YnHQ5FrAp11ecKjOl/48I0rPAtx9ZhnsJm5YDKF fL36B8LkBJygUBq4cNiQoMA9n34GFakBF/7XQ5BkgcBy4h+DQN7t2k00gCiETZW314wW wxeXXrMtqwvrS58zI93nRG8g5ZJVhdvuqNj2OJbfSK0ZXkQ1AyOpGNfwElnXpX342Ath TOlVr+raaZLg5GQD3As7BgaoKesOz8QTeCWIXOJZJmbKelL6lulvrAjq8rk/sfe6wAqz BDvg== X-Gm-Message-State: AOAM531AUGoDl0vS5HbohHFFD5hZ1eCSL3XHACihb9M18nkS9KVa+nL3 +fetTP0QjrKCigx+uAmJjay0+A== X-Google-Smtp-Source: ABdhPJwimDhYyddymRxBCGj9F04EBR3CDzft0fiHwDgJ3l08K4VUVjY6HdPu2jGBPVyaPoRUT9luVA== X-Received: by 2002:a62:d142:0:b029:19e:62a0:ca1a with SMTP id t2-20020a62d1420000b029019e62a0ca1amr34445419pfl.80.1608176788668; Wed, 16 Dec 2020 19:46:28 -0800 (PST) Received: from localhost.localdomain ([139.177.225.237]) by smtp.gmail.com with ESMTPSA id b2sm3792412pfo.164.2020.12.16.19.46.21 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 Dec 2020 19:46:28 -0800 (PST) From: Muchun Song To: gregkh@linuxfoundation.org, rafael@kernel.org, adobriyan@gmail.com, akpm@linux-foundation.org, hannes@cmpxchg.org, mhocko@kernel.org, vdavydov.dev@gmail.com, hughd@google.com, shakeelb@google.com, guro@fb.com, samitolvanen@google.com, feng.tang@intel.com, neilb@suse.de, iamjoonsoo.kim@lge.com, rdunlap@infradead.org Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Muchun Song Subject: [PATCH v5 7/7] mm: memcontrol: make the slab calculation consistent Date: Thu, 17 Dec 2020 11:43:56 +0800 Message-Id: <20201217034356.4708-8-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20201217034356.4708-1-songmuchun@bytedance.com> References: <20201217034356.4708-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Although the ratio of the slab is one, we also should read the ratio from the related memory_stats instead of hard-coding. And the local variable of size is already the value of slab_unreclaimable. So we do not need to read again. To do this we need some code like below: if (unlikely(memory_stats[i].idx == NR_SLAB_UNRECLAIMABLE_B)) { - size = memcg_page_state(memcg, NR_SLAB_RECLAIMABLE_B) + - memcg_page_state(memcg, NR_SLAB_UNRECLAIMABLE_B); + size += memcg_page_state(memcg, memory_stats[i - 1].idx) * + memory_stats[i - 1].ratio; It requires a series of BUG_ONs or comments to ensure these two items are actually adjacent and in the right order. So it would probably be easier to implement this using a wrapper that has a big switch() for unit conversion. This would fix the ratio inconsistency and get rid of the order guarantee. Signed-off-by: Muchun Song --- mm/memcontrol.c | 105 +++++++++++++++++++++++++++++++++++--------------------- 1 file changed, 66 insertions(+), 39 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a40797a27f87..eec44918d373 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1511,49 +1511,71 @@ static bool mem_cgroup_wait_acct_move(struct mem_cgroup *memcg) struct memory_stat { const char *name; - unsigned int ratio; unsigned int idx; }; static const struct memory_stat memory_stats[] = { - { "anon", PAGE_SIZE, NR_ANON_MAPPED }, - { "file", PAGE_SIZE, NR_FILE_PAGES }, - { "kernel_stack", 1024, NR_KERNEL_STACK_KB }, - { "pagetables", PAGE_SIZE, NR_PAGETABLE }, - { "percpu", 1, MEMCG_PERCPU_B }, - { "sock", PAGE_SIZE, MEMCG_SOCK }, - { "shmem", PAGE_SIZE, NR_SHMEM }, - { "file_mapped", PAGE_SIZE, NR_FILE_MAPPED }, - { "file_dirty", PAGE_SIZE, NR_FILE_DIRTY }, - { "file_writeback", PAGE_SIZE, NR_WRITEBACK }, + { "anon", NR_ANON_MAPPED }, + { "file", NR_FILE_PAGES }, + { "kernel_stack", NR_KERNEL_STACK_KB }, + { "pagetables", NR_PAGETABLE }, + { "percpu", MEMCG_PERCPU_B }, + { "sock", MEMCG_SOCK }, + { "shmem", NR_SHMEM }, + { "file_mapped", NR_FILE_MAPPED }, + { "file_dirty", NR_FILE_DIRTY }, + { "file_writeback", NR_WRITEBACK }, #ifdef CONFIG_TRANSPARENT_HUGEPAGE - { "anon_thp", PAGE_SIZE, NR_ANON_THPS }, - { "file_thp", PAGE_SIZE, NR_FILE_THPS }, - { "shmem_thp", PAGE_SIZE, NR_SHMEM_THPS }, + { "anon_thp", NR_ANON_THPS }, + { "file_thp", NR_FILE_THPS }, + { "shmem_thp", NR_SHMEM_THPS }, #endif - { "inactive_anon", PAGE_SIZE, NR_INACTIVE_ANON }, - { "active_anon", PAGE_SIZE, NR_ACTIVE_ANON }, - { "inactive_file", PAGE_SIZE, NR_INACTIVE_FILE }, - { "active_file", PAGE_SIZE, NR_ACTIVE_FILE }, - { "unevictable", PAGE_SIZE, NR_UNEVICTABLE }, - - /* - * Note: The slab_reclaimable and slab_unreclaimable must be - * together and slab_reclaimable must be in front. - */ - { "slab_reclaimable", 1, NR_SLAB_RECLAIMABLE_B }, - { "slab_unreclaimable", 1, NR_SLAB_UNRECLAIMABLE_B }, + { "inactive_anon", NR_INACTIVE_ANON }, + { "active_anon", NR_ACTIVE_ANON }, + { "inactive_file", NR_INACTIVE_FILE }, + { "active_file", NR_ACTIVE_FILE }, + { "unevictable", NR_UNEVICTABLE }, + { "slab_reclaimable", NR_SLAB_RECLAIMABLE_B }, + { "slab_unreclaimable", NR_SLAB_UNRECLAIMABLE_B }, /* The memory events */ - { "workingset_refault_anon", 1, WORKINGSET_REFAULT_ANON }, - { "workingset_refault_file", 1, WORKINGSET_REFAULT_FILE }, - { "workingset_activate_anon", 1, WORKINGSET_ACTIVATE_ANON }, - { "workingset_activate_file", 1, WORKINGSET_ACTIVATE_FILE }, - { "workingset_restore_anon", 1, WORKINGSET_RESTORE_ANON }, - { "workingset_restore_file", 1, WORKINGSET_RESTORE_FILE }, - { "workingset_nodereclaim", 1, WORKINGSET_NODERECLAIM }, + { "workingset_refault_anon", WORKINGSET_REFAULT_ANON }, + { "workingset_refault_file", WORKINGSET_REFAULT_FILE }, + { "workingset_activate_anon", WORKINGSET_ACTIVATE_ANON }, + { "workingset_activate_file", WORKINGSET_ACTIVATE_FILE }, + { "workingset_restore_anon", WORKINGSET_RESTORE_ANON }, + { "workingset_restore_file", WORKINGSET_RESTORE_FILE }, + { "workingset_nodereclaim", WORKINGSET_NODERECLAIM }, }; +/* Translate stat items to the correct unit for memory.stat output */ +static int memcg_page_state_unit(int item) +{ + switch (item) { + case MEMCG_PERCPU_B: + case NR_SLAB_RECLAIMABLE_B: + case NR_SLAB_UNRECLAIMABLE_B: + case WORKINGSET_REFAULT_ANON: + case WORKINGSET_REFAULT_FILE: + case WORKINGSET_ACTIVATE_ANON: + case WORKINGSET_ACTIVATE_FILE: + case WORKINGSET_RESTORE_ANON: + case WORKINGSET_RESTORE_FILE: + case WORKINGSET_NODERECLAIM: + return 1; + case NR_KERNEL_STACK_KB: + return SZ_1K; + default: + return PAGE_SIZE; + } +} + +static inline unsigned long memcg_page_state_output(struct mem_cgroup *memcg, + int item) +{ + return memcg_page_state(memcg, item) * memcg_page_state_unit(item); +} + static char *memory_stat_format(struct mem_cgroup *memcg) { struct seq_buf s; @@ -1577,13 +1599,12 @@ static char *memory_stat_format(struct mem_cgroup *memcg) for (i = 0; i < ARRAY_SIZE(memory_stats); i++) { u64 size; - size = memcg_page_state(memcg, memory_stats[i].idx); - size *= memory_stats[i].ratio; + size = memcg_page_state_output(memcg, memory_stats[i].idx); seq_buf_printf(&s, "%s %llu\n", memory_stats[i].name, size); if (unlikely(memory_stats[i].idx == NR_SLAB_UNRECLAIMABLE_B)) { - size = memcg_page_state(memcg, NR_SLAB_RECLAIMABLE_B) + - memcg_page_state(memcg, NR_SLAB_UNRECLAIMABLE_B); + size += memcg_page_state_output(memcg, + NR_SLAB_RECLAIMABLE_B); seq_buf_printf(&s, "slab %llu\n", size); } } @@ -6377,6 +6398,12 @@ static int memory_stat_show(struct seq_file *m, void *v) } #ifdef CONFIG_NUMA +static inline unsigned long lruvec_page_state_output(struct lruvec *lruvec, + int item) +{ + return lruvec_page_state(lruvec, item) * memcg_page_state_unit(item); +} + static int memory_numa_stat_show(struct seq_file *m, void *v) { int i; @@ -6394,8 +6421,8 @@ static int memory_numa_stat_show(struct seq_file *m, void *v) struct lruvec *lruvec; lruvec = mem_cgroup_lruvec(memcg, NODE_DATA(nid)); - size = lruvec_page_state(lruvec, memory_stats[i].idx); - size *= memory_stats[i].ratio; + size = lruvec_page_state_output(lruvec, + memory_stats[i].idx); seq_printf(m, " N%d=%llu", nid, size); } seq_putc(m, '\n');