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, 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 25C4CC433ED for ; Mon, 5 Apr 2021 18:09:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F3F7B61246 for ; Mon, 5 Apr 2021 18:09:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240057AbhDESJ0 (ORCPT ); Mon, 5 Apr 2021 14:09:26 -0400 Received: from mga09.intel.com ([134.134.136.24]:44460 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233234AbhDESJK (ORCPT ); Mon, 5 Apr 2021 14:09:10 -0400 IronPort-SDR: AsaJdjHlvXYMgWXK5OUDsiH9eD71N5kP3ciF1LceCvf9YweW5XeB/oKyPCPvb5HIjXNi55JinL YwJ3e0krMljg== X-IronPort-AV: E=McAfee;i="6000,8403,9945"; a="193010919" X-IronPort-AV: E=Sophos;i="5.81,307,1610438400"; d="scan'208";a="193010919" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Apr 2021 11:09:03 -0700 IronPort-SDR: +VoR0p/UgOe2wYsmoXbNkTgi4fj3Sr4bGRZZcdv98Loe80ptqI4Vscp6yUH/RbLdEo6Zw+pzm4 zinar7ufsiag== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,307,1610438400"; d="scan'208";a="448153903" Received: from skl-02.jf.intel.com ([10.54.74.28]) by fmsmga002.fm.intel.com with ESMTP; 05 Apr 2021 11:09:03 -0700 From: Tim Chen To: Michal Hocko Cc: Tim Chen , Johannes Weiner , Andrew Morton , Dave Hansen , Ying Huang , Dan Williams , David Rientjes , Shakeel Butt , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v1 04/11] mm: Report top tier memory usage in sysfs Date: Mon, 5 Apr 2021 10:08:28 -0700 Message-Id: <1196182bf902e36c8ecbf2afb7dd570e96c99ff4.1617642417.git.tim.c.chen@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In memory cgroup's sysfs, report the memory cgroup's usage of top tier memory in a new field: "toptier_usage_in_bytes". Signed-off-by: Tim Chen --- mm/memcontrol.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index fe7bb8613f5a..68590f46fa76 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3631,6 +3631,7 @@ enum { RES_FAILCNT, RES_SOFT_LIMIT, RES_TOPTIER_SOFT_LIMIT, + RES_TOPTIER_USAGE, }; static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css, @@ -3673,6 +3674,8 @@ static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css, return (u64)memcg->soft_limit * PAGE_SIZE; case RES_TOPTIER_SOFT_LIMIT: return (u64)memcg->toptier_soft_limit * PAGE_SIZE; + case RES_TOPTIER_USAGE: + return (u64)page_counter_read(&memcg->toptier) * PAGE_SIZE; default: BUG(); } @@ -5073,6 +5076,11 @@ static struct cftype mem_cgroup_legacy_files[] = { .write = mem_cgroup_write, .read_u64 = mem_cgroup_read_u64, }, + { + .name = "toptier_usage_in_bytes", + .private = MEMFILE_PRIVATE(_MEM, RES_TOPTIER_USAGE), + .read_u64 = mem_cgroup_read_u64, + }, { .name = "failcnt", .private = MEMFILE_PRIVATE(_MEM, RES_FAILCNT), -- 2.20.1