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=-16.8 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 4F7BFC2BB40 for ; Thu, 17 Dec 2020 03:47:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1AB682371F for ; Thu, 17 Dec 2020 03:47:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728660AbgLQDrQ (ORCPT ); Wed, 16 Dec 2020 22:47:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728462AbgLQDrP (ORCPT ); Wed, 16 Dec 2020 22:47:15 -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 13DDCC0611CF for ; Wed, 16 Dec 2020 19:46:06 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id l23so3319590pjg.1 for ; Wed, 16 Dec 2020 19:46:06 -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=xPjoCn2Uhs8i6RF8GvQfWf4AwMz+svXGYxnAYdmZuDI=; b=FdA31vfhWIaMgeUtFlI+xUN18KN7HWs+1u/iMKZ8h9cFMId0stAFiuLOownLzArh8L 2fzM9WXVHXZsmTiYNgo8QU7+nQP5UM8beR3pMq/h2X1dBGboRcETj+dNmhqlDaQoz+tu jz1pWXsd2WzKOVU326tp4I/9a5CfKgWPYoZN4guHONSWx/6s4ArO6aaZ/yICNOSS3owR 4Hz/ORKvyCLq6lO7V8pspKM5mgeVd12DulFBRz5iBhBkH0+NqpSvhza0Yo3upeYmRnhj nFIsfm6BHRg2N3TztOzHwrCed+GDNCsUpURley6YjEjMkGrm0zE9jNwnxsaMV+iX5M96 t44A== 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=xPjoCn2Uhs8i6RF8GvQfWf4AwMz+svXGYxnAYdmZuDI=; b=JSYrFwNl5sdpaHazS+lObJCcqvOnKZATNzh30NsWht/j1xHokwOVtaamYHtpAiNnkK i6KIqEJJ8XWql8Tr7tDtUN8tmyA3485hzZigrL7qXKhJfLcMyixY8kmB9MuSmnGLZKd+ /CImxpqEouDSZNCP2uWeaKy2UV3vPKDDmlNncpfDeoK+X0ErwufB/1mz7eGRXetiGFMZ OAPxM0syuG2+DKIZeKAtxVhJVKI0SANUT/hyIEJvxGEzjo4wVqCOx81t6Z4+pCn4e7MB XTNoLmwKhQa3WQaCpZhj1OtIXFhEnKH1lYnnBUZtpQXam6N/Q1x82UNdL8OBg/JrEfGl ROKw== X-Gm-Message-State: AOAM531Lmev4jwXHU3VlAAsOeVW8V4lO3QCZSRWGjNzluP5q1CuAaGtC a2i3o3a8oy4JkE6RzT4fhR0IyQ== X-Google-Smtp-Source: ABdhPJyslSNhwkUQPenLnPmRpXXnGeJnaiZemfAb8ZSiBZaOJ+bSnMxU+5XmF2/JoA9qIu+/teWM9Q== X-Received: by 2002:a17:90a:638a:: with SMTP id f10mr6021880pjj.191.1608176765601; Wed, 16 Dec 2020 19:46:05 -0800 (PST) Received: from localhost.localdomain ([139.177.225.237]) by smtp.gmail.com with ESMTPSA id b2sm3792412pfo.164.2020.12.16.19.45.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 Dec 2020 19:46:05 -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 4/7] mm: memcontrol: convert NR_SHMEM_THPS account to pages Date: Thu, 17 Dec 2020 11:43:53 +0800 Message-Id: <20201217034356.4708-5-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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently we use struct per_cpu_nodestat to cache the vmstat counters, which leads to inaccurate statistics expecially THP vmstat counters. In the systems with hundreads of processors it can be GBs of memory. For example, for a 96 CPUs system, the threshold is the maximum number of 125. And the per cpu counters can cache 23.4375 GB in total. The THP page is already a form of batched addition (it will add 512 worth of memory in one go) so skipping the batching seems like sensible. Although every THP stats update overflows the per-cpu counter, resorting to atomic global updates. But it can make the statistics more accuracy for the THP vmstat counters. So we convert the NR_SHMEM_THPS account to pages. This patch is consistent with 8f182270dfec ("mm/swap.c: flush lru pvecs on compound page arrival"). Doing this also can make the unit of vmstat counters more unified. Finally, the unit of the vmstat counters are pages, kB and bytes. The B/KB suffix can tell us that the unit is bytes or kB. The rest which is without suffix are pages. Signed-off-by: Muchun Song --- drivers/base/node.c | 3 +-- fs/proc/meminfo.c | 2 +- include/linux/mmzone.h | 3 ++- mm/filemap.c | 2 +- mm/huge_memory.c | 3 ++- mm/khugepaged.c | 2 +- mm/memcontrol.c | 26 ++------------------------ mm/page_alloc.c | 2 +- mm/shmem.c | 2 +- 9 files changed, 12 insertions(+), 33 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index d5952f754911..6d5ac6ffb6e1 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -462,8 +462,7 @@ static ssize_t node_read_meminfo(struct device *dev, #ifdef CONFIG_TRANSPARENT_HUGEPAGE , nid, K(node_page_state(pgdat, NR_ANON_THPS)), - nid, K(node_page_state(pgdat, NR_SHMEM_THPS) * - HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_SHMEM_THPS)), nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR), nid, K(node_page_state(pgdat, NR_FILE_THPS)), diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index 7ea4679880c8..cfb107eaa3e6 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -131,7 +131,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v) show_val_kb(m, "AnonHugePages: ", global_node_page_state(NR_ANON_THPS)); show_val_kb(m, "ShmemHugePages: ", - global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR); + global_node_page_state(NR_SHMEM_THPS)); show_val_kb(m, "ShmemPmdMapped: ", global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR); show_val_kb(m, "FileHugePages: ", diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 19e77f656410..3b45f39011ab 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -217,7 +217,8 @@ enum node_stat_item { static __always_inline bool vmstat_item_print_in_thp(enum node_stat_item item) { return item == NR_ANON_THPS || - item == NR_FILE_THPS; + item == NR_FILE_THPS || + item == NR_SHMEM_THPS; } /* diff --git a/mm/filemap.c b/mm/filemap.c index c5e6f5202476..1952e923cc2e 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -205,7 +205,7 @@ static void unaccount_page_cache_page(struct address_space *mapping, if (PageSwapBacked(page)) { __mod_lruvec_page_state(page, NR_SHMEM, -nr); if (PageTransHuge(page)) - __dec_lruvec_page_state(page, NR_SHMEM_THPS); + __mod_lruvec_page_state(page, NR_SHMEM_THPS, -nr); } else if (PageTransHuge(page)) { __mod_lruvec_page_state(page, NR_FILE_THPS, -nr); filemap_nr_thps_dec(mapping); diff --git a/mm/huge_memory.c b/mm/huge_memory.c index cdf61596ef76..5aa045e3b5dc 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2748,7 +2748,8 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) int nr = thp_nr_pages(head); if (PageSwapBacked(head)) - __dec_lruvec_page_state(head, NR_SHMEM_THPS); + __mod_lruvec_page_state(head, NR_SHMEM_THPS, + -nr); else __mod_lruvec_page_state(head, NR_FILE_THPS, -nr); diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 23f93a3e2e69..8369d9620f6d 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1869,7 +1869,7 @@ static void collapse_file(struct mm_struct *mm, nr = thp_nr_pages(new_page); if (is_shmem) - __inc_lruvec_page_state(new_page, NR_SHMEM_THPS); + __mod_lruvec_page_state(new_page, NR_SHMEM_THPS, nr); else { __mod_lruvec_page_state(new_page, NR_FILE_THPS, nr); filemap_nr_thps_inc(mapping); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 04985c8c6a0a..a40797a27f87 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1515,7 +1515,7 @@ struct memory_stat { unsigned int idx; }; -static struct memory_stat memory_stats[] = { +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 }, @@ -1527,14 +1527,9 @@ static struct memory_stat memory_stats[] = { { "file_dirty", PAGE_SIZE, NR_FILE_DIRTY }, { "file_writeback", PAGE_SIZE, NR_WRITEBACK }, #ifdef CONFIG_TRANSPARENT_HUGEPAGE - /* - * The ratio will be initialized in memory_stats_init(). Because - * on some architectures, the macro of HPAGE_PMD_SIZE is not - * constant(e.g. powerpc). - */ { "anon_thp", PAGE_SIZE, NR_ANON_THPS }, { "file_thp", PAGE_SIZE, NR_FILE_THPS }, - { "shmem_thp", 0, NR_SHMEM_THPS }, + { "shmem_thp", PAGE_SIZE, NR_SHMEM_THPS }, #endif { "inactive_anon", PAGE_SIZE, NR_INACTIVE_ANON }, { "active_anon", PAGE_SIZE, NR_ACTIVE_ANON }, @@ -1559,23 +1554,6 @@ static struct memory_stat memory_stats[] = { { "workingset_nodereclaim", 1, WORKINGSET_NODERECLAIM }, }; -static int __init memory_stats_init(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(memory_stats); i++) { -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - if (memory_stats[i].idx == NR_SHMEM_THPS) - memory_stats[i].ratio = HPAGE_PMD_SIZE; -#endif - VM_BUG_ON(!memory_stats[i].ratio); - VM_BUG_ON(memory_stats[i].idx >= MEMCG_NR_STAT); - } - - return 0; -} -pure_initcall(memory_stats_init); - static char *memory_stat_format(struct mem_cgroup *memcg) { struct seq_buf s; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 1700f52b7869..720fb5a220b6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5577,7 +5577,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask) K(node_page_state(pgdat, NR_WRITEBACK)), K(node_page_state(pgdat, NR_SHMEM)), #ifdef CONFIG_TRANSPARENT_HUGEPAGE - K(node_page_state(pgdat, NR_SHMEM_THPS) * HPAGE_PMD_NR), + K(node_page_state(pgdat, NR_SHMEM_THPS)), K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR), K(node_page_state(pgdat, NR_ANON_THPS)), diff --git a/mm/shmem.c b/mm/shmem.c index 53d84d2c9fe5..de261cfbf987 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -713,7 +713,7 @@ static int shmem_add_to_page_cache(struct page *page, } if (PageTransHuge(page)) { count_vm_event(THP_FILE_ALLOC); - __inc_lruvec_page_state(page, NR_SHMEM_THPS); + __mod_lruvec_page_state(page, NR_SHMEM_THPS, nr); } mapping->nrpages += nr; __mod_lruvec_page_state(page, NR_FILE_PAGES, nr); -- 2.11.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Muchun Song Subject: [PATCH v5 4/7] mm: memcontrol: convert NR_SHMEM_THPS account to pages Date: Thu, 17 Dec 2020 11:43:53 +0800 Message-ID: <20201217034356.4708-5-songmuchun@bytedance.com> References: <20201217034356.4708-1-songmuchun@bytedance.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: 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=xPjoCn2Uhs8i6RF8GvQfWf4AwMz+svXGYxnAYdmZuDI=; b=FdA31vfhWIaMgeUtFlI+xUN18KN7HWs+1u/iMKZ8h9cFMId0stAFiuLOownLzArh8L 2fzM9WXVHXZsmTiYNgo8QU7+nQP5UM8beR3pMq/h2X1dBGboRcETj+dNmhqlDaQoz+tu jz1pWXsd2WzKOVU326tp4I/9a5CfKgWPYoZN4guHONSWx/6s4ArO6aaZ/yICNOSS3owR 4Hz/ORKvyCLq6lO7V8pspKM5mgeVd12DulFBRz5iBhBkH0+NqpSvhza0Yo3upeYmRnhj nFIsfm6BHRg2N3TztOzHwrCed+GDNCsUpURley6YjEjMkGrm0zE9jNwnxsaMV+iX5M96 t44A== In-Reply-To: <20201217034356.4708-1-songmuchun-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org> List-ID: Content-Type: text/plain; charset="us-ascii" To: gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, rafael-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, adobriyan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org, mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, vdavydov.dev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, guro-b10kYP2dOMg@public.gmane.org, samitolvanen-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, feng.tang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, neilb-l3A5Bk7waGM@public.gmane.org, iamjoonsoo.kim-Hm3cg6mZ9cc@public.gmane.org, rdunlap-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Muchun Song Currently we use struct per_cpu_nodestat to cache the vmstat counters, which leads to inaccurate statistics expecially THP vmstat counters. In the systems with hundreads of processors it can be GBs of memory. For example, for a 96 CPUs system, the threshold is the maximum number of 125. And the per cpu counters can cache 23.4375 GB in total. The THP page is already a form of batched addition (it will add 512 worth of memory in one go) so skipping the batching seems like sensible. Although every THP stats update overflows the per-cpu counter, resorting to atomic global updates. But it can make the statistics more accuracy for the THP vmstat counters. So we convert the NR_SHMEM_THPS account to pages. This patch is consistent with 8f182270dfec ("mm/swap.c: flush lru pvecs on compound page arrival"). Doing this also can make the unit of vmstat counters more unified. Finally, the unit of the vmstat counters are pages, kB and bytes. The B/KB suffix can tell us that the unit is bytes or kB. The rest which is without suffix are pages. Signed-off-by: Muchun Song --- drivers/base/node.c | 3 +-- fs/proc/meminfo.c | 2 +- include/linux/mmzone.h | 3 ++- mm/filemap.c | 2 +- mm/huge_memory.c | 3 ++- mm/khugepaged.c | 2 +- mm/memcontrol.c | 26 ++------------------------ mm/page_alloc.c | 2 +- mm/shmem.c | 2 +- 9 files changed, 12 insertions(+), 33 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index d5952f754911..6d5ac6ffb6e1 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -462,8 +462,7 @@ static ssize_t node_read_meminfo(struct device *dev, #ifdef CONFIG_TRANSPARENT_HUGEPAGE , nid, K(node_page_state(pgdat, NR_ANON_THPS)), - nid, K(node_page_state(pgdat, NR_SHMEM_THPS) * - HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_SHMEM_THPS)), nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR), nid, K(node_page_state(pgdat, NR_FILE_THPS)), diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index 7ea4679880c8..cfb107eaa3e6 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -131,7 +131,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v) show_val_kb(m, "AnonHugePages: ", global_node_page_state(NR_ANON_THPS)); show_val_kb(m, "ShmemHugePages: ", - global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR); + global_node_page_state(NR_SHMEM_THPS)); show_val_kb(m, "ShmemPmdMapped: ", global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR); show_val_kb(m, "FileHugePages: ", diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 19e77f656410..3b45f39011ab 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -217,7 +217,8 @@ enum node_stat_item { static __always_inline bool vmstat_item_print_in_thp(enum node_stat_item item) { return item == NR_ANON_THPS || - item == NR_FILE_THPS; + item == NR_FILE_THPS || + item == NR_SHMEM_THPS; } /* diff --git a/mm/filemap.c b/mm/filemap.c index c5e6f5202476..1952e923cc2e 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -205,7 +205,7 @@ static void unaccount_page_cache_page(struct address_space *mapping, if (PageSwapBacked(page)) { __mod_lruvec_page_state(page, NR_SHMEM, -nr); if (PageTransHuge(page)) - __dec_lruvec_page_state(page, NR_SHMEM_THPS); + __mod_lruvec_page_state(page, NR_SHMEM_THPS, -nr); } else if (PageTransHuge(page)) { __mod_lruvec_page_state(page, NR_FILE_THPS, -nr); filemap_nr_thps_dec(mapping); diff --git a/mm/huge_memory.c b/mm/huge_memory.c index cdf61596ef76..5aa045e3b5dc 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2748,7 +2748,8 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) int nr = thp_nr_pages(head); if (PageSwapBacked(head)) - __dec_lruvec_page_state(head, NR_SHMEM_THPS); + __mod_lruvec_page_state(head, NR_SHMEM_THPS, + -nr); else __mod_lruvec_page_state(head, NR_FILE_THPS, -nr); diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 23f93a3e2e69..8369d9620f6d 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1869,7 +1869,7 @@ static void collapse_file(struct mm_struct *mm, nr = thp_nr_pages(new_page); if (is_shmem) - __inc_lruvec_page_state(new_page, NR_SHMEM_THPS); + __mod_lruvec_page_state(new_page, NR_SHMEM_THPS, nr); else { __mod_lruvec_page_state(new_page, NR_FILE_THPS, nr); filemap_nr_thps_inc(mapping); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 04985c8c6a0a..a40797a27f87 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1515,7 +1515,7 @@ struct memory_stat { unsigned int idx; }; -static struct memory_stat memory_stats[] = { +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 }, @@ -1527,14 +1527,9 @@ static struct memory_stat memory_stats[] = { { "file_dirty", PAGE_SIZE, NR_FILE_DIRTY }, { "file_writeback", PAGE_SIZE, NR_WRITEBACK }, #ifdef CONFIG_TRANSPARENT_HUGEPAGE - /* - * The ratio will be initialized in memory_stats_init(). Because - * on some architectures, the macro of HPAGE_PMD_SIZE is not - * constant(e.g. powerpc). - */ { "anon_thp", PAGE_SIZE, NR_ANON_THPS }, { "file_thp", PAGE_SIZE, NR_FILE_THPS }, - { "shmem_thp", 0, NR_SHMEM_THPS }, + { "shmem_thp", PAGE_SIZE, NR_SHMEM_THPS }, #endif { "inactive_anon", PAGE_SIZE, NR_INACTIVE_ANON }, { "active_anon", PAGE_SIZE, NR_ACTIVE_ANON }, @@ -1559,23 +1554,6 @@ static struct memory_stat memory_stats[] = { { "workingset_nodereclaim", 1, WORKINGSET_NODERECLAIM }, }; -static int __init memory_stats_init(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(memory_stats); i++) { -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - if (memory_stats[i].idx == NR_SHMEM_THPS) - memory_stats[i].ratio = HPAGE_PMD_SIZE; -#endif - VM_BUG_ON(!memory_stats[i].ratio); - VM_BUG_ON(memory_stats[i].idx >= MEMCG_NR_STAT); - } - - return 0; -} -pure_initcall(memory_stats_init); - static char *memory_stat_format(struct mem_cgroup *memcg) { struct seq_buf s; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 1700f52b7869..720fb5a220b6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5577,7 +5577,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask) K(node_page_state(pgdat, NR_WRITEBACK)), K(node_page_state(pgdat, NR_SHMEM)), #ifdef CONFIG_TRANSPARENT_HUGEPAGE - K(node_page_state(pgdat, NR_SHMEM_THPS) * HPAGE_PMD_NR), + K(node_page_state(pgdat, NR_SHMEM_THPS)), K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR), K(node_page_state(pgdat, NR_ANON_THPS)), diff --git a/mm/shmem.c b/mm/shmem.c index 53d84d2c9fe5..de261cfbf987 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -713,7 +713,7 @@ static int shmem_add_to_page_cache(struct page *page, } if (PageTransHuge(page)) { count_vm_event(THP_FILE_ALLOC); - __inc_lruvec_page_state(page, NR_SHMEM_THPS); + __mod_lruvec_page_state(page, NR_SHMEM_THPS, nr); } mapping->nrpages += nr; __mod_lruvec_page_state(page, NR_FILE_PAGES, nr); -- 2.11.0