From patchwork Wed Mar 12 00:06:56 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Pache X-Patchwork-Id: 14012769 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 01CF3C282EC for ; Wed, 12 Mar 2025 00:10:27 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.909559.1316496 (Exim 4.92) (envelope-from ) id 1ts9fr-0002Yd-Lj; Wed, 12 Mar 2025 00:10:15 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 909559.1316496; Wed, 12 Mar 2025 00:10:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ts9fr-0002Xf-El; Wed, 12 Mar 2025 00:10:15 +0000 Received: by outflank-mailman (input) for mailman id 909559; Wed, 12 Mar 2025 00:07:52 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ts9dY-00013p-4W for xen-devel@lists.xenproject.org; Wed, 12 Mar 2025 00:07:52 +0000 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 07a42816-fed6-11ef-9898-31a8f345e629; Wed, 12 Mar 2025 01:07:48 +0100 (CET) Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-223-vkQ8710FPFOYX9_CxAjz-Q-1; Tue, 11 Mar 2025 20:07:42 -0400 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 2CA19195608F; Wed, 12 Mar 2025 00:07:38 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.88.56]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 3CA451955F0F; Wed, 12 Mar 2025 00:07:30 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 07a42816-fed6-11ef-9898-31a8f345e629 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741738067; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ceDeMBe52N2seuUa756T2OuNElv+sx4xmpEJqAZFNJ0=; b=ZA625eOmgzmi/qVEmreX+Of5XknsZbrx9v9HYLM2bBfRxHjNLMpkTIOxLdDhhEwjHdC9P/ FYqvhMsklJql6XiqJPlz5bnnVIHcjGm7aMIPvX4go8q7w0ZnjIaowlKC4uSVmgIU7HT/l/ Z75IbqeNuZS0bOislCEbadalJCNd1LA= X-MC-Unique: vkQ8710FPFOYX9_CxAjz-Q-1 X-Mimecast-MFC-AGG-ID: vkQ8710FPFOYX9_CxAjz-Q_1741738058 From: Nico Pache To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jerrin.shaji-george@broadcom.com, bcm-kernel-feedback-list@broadcom.com, arnd@arndb.de, gregkh@linuxfoundation.org, mst@redhat.com, david@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, jgross@suse.com, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, akpm@linux-foundation.org, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, nphamcs@gmail.com, yosry.ahmed@linux.dev, kanchana.p.sridhar@intel.com, alexander.atanasov@virtuozzo.com Subject: [RFC 1/5] meminfo: add a per node counter for balloon drivers Date: Tue, 11 Mar 2025 18:06:56 -0600 Message-ID: <20250312000700.184573-2-npache@redhat.com> In-Reply-To: <20250312000700.184573-1-npache@redhat.com> References: <20250312000700.184573-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Add NR_BALLOON_PAGES counter to track memory used by balloon drivers and expose it through /proc/meminfo and other memory reporting interfaces. Signed-off-by: Nico Pache --- fs/proc/meminfo.c | 2 ++ include/linux/mmzone.h | 1 + mm/memcontrol.c | 1 + mm/show_mem.c | 4 +++- mm/vmstat.c | 1 + 5 files changed, 8 insertions(+), 1 deletion(-) diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index 8ba9b1472390..83be312159c9 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -162,6 +162,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v) show_val_kb(m, "Unaccepted: ", global_zone_page_state(NR_UNACCEPTED)); #endif + show_val_kb(m, "Balloon: ", + global_node_page_state(NR_BALLOON_PAGES)); hugetlb_report_meminfo(m); diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 9540b41894da..71d3ff19267a 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -223,6 +223,7 @@ enum node_stat_item { #ifdef CONFIG_HUGETLB_PAGE NR_HUGETLB, #endif + NR_BALLOON_PAGES, NR_VM_NODE_STAT_ITEMS }; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 4de6acb9b8ec..182b44646bfa 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1377,6 +1377,7 @@ static const struct memory_stat memory_stats[] = { #ifdef CONFIG_HUGETLB_PAGE { "hugetlb", NR_HUGETLB }, #endif + { "nr_balloon_pages", NR_BALLOON_PAGES }, /* The memory events */ { "workingset_refault_anon", WORKINGSET_REFAULT_ANON }, diff --git a/mm/show_mem.c b/mm/show_mem.c index 43afb56abbd3..6af13bcd2ab3 100644 --- a/mm/show_mem.c +++ b/mm/show_mem.c @@ -260,6 +260,7 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z " pagetables:%lukB" " sec_pagetables:%lukB" " all_unreclaimable? %s" + " Balloon:%lukB" "\n", pgdat->node_id, K(node_page_state(pgdat, NR_ACTIVE_ANON)), @@ -285,7 +286,8 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z #endif K(node_page_state(pgdat, NR_PAGETABLE)), K(node_page_state(pgdat, NR_SECONDARY_PAGETABLE)), - str_yes_no(pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES)); + str_yes_no(pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES), + K(node_page_state(pgdat, NR_BALLOON_PAGES))); } for_each_populated_zone(zone) { diff --git a/mm/vmstat.c b/mm/vmstat.c index 16bfe1c694dd..d3b11891a942 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1276,6 +1276,7 @@ const char * const vmstat_text[] = { #ifdef CONFIG_HUGETLB_PAGE "nr_hugetlb", #endif + "nr_balloon_pages", /* system-wide enum vm_stat_item counters */ "nr_dirty_threshold", "nr_dirty_background_threshold",