From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.7 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=ham 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 AC877C2BBCA for ; Tue, 8 Dec 2020 04:22:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 791A1239EB for ; Tue, 8 Dec 2020 04:22:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727473AbgLHEWk (ORCPT ); Mon, 7 Dec 2020 23:22:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727290AbgLHEWj (ORCPT ); Mon, 7 Dec 2020 23:22:39 -0500 Received: from mail-pl1-x644.google.com (mail-pl1-x644.google.com [IPv6:2607:f8b0:4864:20::644]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 393D2C061749 for ; Mon, 7 Dec 2020 20:21:43 -0800 (PST) Received: by mail-pl1-x644.google.com with SMTP id t6so763163plq.1 for ; Mon, 07 Dec 2020 20:21:43 -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=iuruSM5Wk5IQuXnGIYHAC1ej2c7Wmgf5EexDWUENUOw=; b=JvSBmHPkXQn9tqltsKxRwqdG3L4xMxx3IUPXwtPqKOYEyGp238OQgLQ7jDXPKt24e3 sYkRd9arNELgXCsNFausQ1G47Il3mclukxuUag5+wS39WymDZvYjin+7g0neRTqG8Y9n VO9rU6zNwtU41CReh9zDnH2Ljy1keWq+zuZwRvTfmgKg83qpHAMoB4/mXprbbYLETe6G RBRnybRoEHBts/t70AtrP2bQhcUwjOJ8oh3mfZrTGORG02pzBeqFJEBegTzngrCn72XV gPVe66zYzpbG9bk4zkDzACtObij3N/ESHJn/3qupwhqJAPbI9bj6K33pWLyewDQtt+LB wCXg== 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=iuruSM5Wk5IQuXnGIYHAC1ej2c7Wmgf5EexDWUENUOw=; b=Gc9AK48JPenKg+z7p79dUppXG2AqERWIrYjDJ4Jsv20SrI5qRFo2QN2wySnLC+qk+e TfwQ5jWaTnQul8UxdB+EfWfav4WI5t9CyWw33jvjfg/er+2evkrOqLbDD7aB/KZ0KfH1 xWWeXPbjawPvvnjI/smCKe9v6x51bpsYetXi275b0BpmF5YcdHZjY/XYFJVVZ04dI8Yk 0DUZz+W591wb4NSwyUdfgG1E8xV2FTHWHJYg4s9xbC/rT1yK9fXueztEVikkdwNoieOd Hcdy8VRCpf4cyxQwixgc/D3CL57FLPjUuKHhcfbj1W4E5nFH62QNuXC+7FS2SXUi5QuA ixWA== X-Gm-Message-State: AOAM532jcqO4MZiewp2DzzosMNx3GIjztr+1f6wc5xV78bZiy09z2RwS lNi6Wgvy4Ol110haPQ9HkbMxcw== X-Google-Smtp-Source: ABdhPJwCAN4zm3sxSIMbaeUGH8Q36ijCLpemWCrzTBw2fM2/G6fQIIQjIkxW+ToQpB618UjA8kaeLg== X-Received: by 2002:a17:902:6803:b029:d6:cf9d:2cfb with SMTP id h3-20020a1709026803b02900d6cf9d2cfbmr19526373plk.55.1607401302801; Mon, 07 Dec 2020 20:21:42 -0800 (PST) Received: from localhost.localdomain ([103.136.221.70]) by smtp.gmail.com with ESMTPSA id mr7sm1031166pjb.31.2020.12.07.20.21.35 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 Dec 2020 20:21:42 -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 v3 7/7] mm: memcontrol: make the slab calculation consistent Date: Tue, 8 Dec 2020 12:18:47 +0800 Message-Id: <20201208041847.72122-8-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20201208041847.72122-1-songmuchun@bytedance.com> References: <20201208041847.72122-1-songmuchun@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. We can drop the ratio in struct memory_stat. This can make the code clean and simple. And get rid of the awkward mix of static and runtime initialization of the memory_stats table. Signed-off-by: Muchun Song --- mm/memcontrol.c | 112 ++++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 73 insertions(+), 39 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a40797a27f87..841ea37cc123 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1511,49 +1511,78 @@ 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) +{ + int unit; + + 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: + unit = 1; + break; + case NR_KERNEL_STACK_KB: + unit = SZ_1K; + break; + default: + unit = PAGE_SIZE; + break; + } + + return unit; +} + +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 +1606,12 @@ 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 +6405,12 @@ 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 +6428,8 @@ 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'); -- 2.11.0