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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D633C43334 for ; Tue, 14 Jun 2022 22:26:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344143AbiFNW0S (ORCPT ); Tue, 14 Jun 2022 18:26:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344134AbiFNW0N (ORCPT ); Tue, 14 Jun 2022 18:26:13 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9EAED5002A for ; Tue, 14 Jun 2022 15:26:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1655245572; x=1686781572; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gSBoEG1kj/hIctq3Ckgu1ns/0pG+bGgO59Azngc0Rcw=; b=ZIsaJU0rVf7VVZvUXj7TPpMDYumTsSF8iu1ZrVQr4/ABeJGOaVApKvGq 8mCZcCKoPQ0ynzTJHGPWGAouJHgZnuU8ZoQ6tdZ6ZG3l90w+EKOwzaAnt cDVITmQvbe5xF4FmiST2kx3uBpmpzGBemYn87Wtyp6iBUIw7J1LXs+tc9 eM4XLOegdH6G2ZweXilimlZInWDbndyzJi7Uz4z3ofayba2YiBBKjWC75 QLA0TiIGmwrfFqsyI0mSsb7tbXoP1xrBHtxEbHOe6KCyZkQdhtwaJtWFd LcHjYrfFO61aJ9XUOL2VrsjqU+fCf5PKAEDlg8RZm4GnxQjzwGWI52XpJ w==; X-IronPort-AV: E=McAfee;i="6400,9594,10378"; a="340422010" X-IronPort-AV: E=Sophos;i="5.91,300,1647327600"; d="scan'208";a="340422010" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2022 15:26:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,300,1647327600"; d="scan'208";a="588724718" Received: from b04f130c83f2.jf.intel.com ([10.165.154.98]) by fmsmga007.fm.intel.com with ESMTP; 14 Jun 2022 15:26:11 -0700 From: Tim Chen To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: Tim Chen , Wei Xu , Huang Ying , Greg Thelen , Yang Shi , Davidlohr Bueso , Brice Goglin , Michal Hocko , Linux Kernel Mailing List , Hesham Almatary , Dave Hansen , Jonathan Cameron , Alistair Popple , Dan Williams , Feng Tang , Jagdish Gediya , Baolin Wang , David Rientjes , "Aneesh Kumar K . V" , Shakeel Butt Subject: [RFC PATCH 1/3] mm/memory-tiers Add functions for tier memory usage in a cgroup Date: Tue, 14 Jun 2022 15:25:33 -0700 Message-Id: <94a10c772c50d378b81dad654476551bfc50e3d7.1655242024.git.tim.c.chen@linux.intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add functions to provide tier based memory usage. This is in preparation for query via sysfs and for controlling a cgroup's top tier memory usage. This patch introduces the tiered memory usage query interface and a simple implementation. A more efficient implementation to get toptier memory usage will be introduced in the next patch. --- include/linux/memory-tiers.h | 2 ++ mm/memcontrol.c | 35 +++++++++++++++++++++++++++++++++++ mm/memory-tiers.c | 3 ++- 3 files changed, 39 insertions(+), 1 deletion(-) diff --git a/include/linux/memory-tiers.h b/include/linux/memory-tiers.h index de4098f6d5d5..1177dcbbdeda 100644 --- a/include/linux/memory-tiers.h +++ b/include/linux/memory-tiers.h @@ -31,6 +31,8 @@ struct memory_tier { }; extern bool numa_demotion_enabled; +extern struct list_head memory_tiers; + int node_create_and_set_memory_tier(int node, int tier); int next_demotion_node(int node); int node_set_memory_tier(int node, int tier); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index abec50f31fe6..2f6e95e6d200 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -63,6 +63,7 @@ #include #include #include +#include #include "internal.h" #include #include @@ -3921,6 +3922,40 @@ static int memcg_numa_stat_show(struct seq_file *m, void *v) return 0; } + +unsigned long mem_cgroup_memtier_usage(struct mem_cgroup *memcg, + struct memory_tier *memtier) +{ + int node; + struct memory_tier *node_tier; + unsigned long usage = 0; + + if (!memcg) + return 0; + + rcu_read_lock(); + for_each_online_node(node) { + node_tier = node_get_memory_tier(node); + if (node_tier == memtier) + usage += mem_cgroup_node_nr_lru_pages(memcg, node, + LRU_ALL, true); + node_put_memory_tier(node_tier); + } + rcu_read_unlock(); + return usage; +} + +unsigned long mem_cgroup_toptier_usage(struct mem_cgroup *memcg) +{ + struct memory_tier *top_tier; + + top_tier = list_first_entry(&memory_tiers, struct memory_tier, list); + if (top_tier) + return mem_cgroup_memtier_usage(memcg, top_tier); + else + return 0; +} + #endif /* CONFIG_NUMA */ static const unsigned int memcg1_stats[] = { diff --git a/mm/memory-tiers.c b/mm/memory-tiers.c index 0dae3114e22c..d552ac1e9d57 100644 --- a/mm/memory-tiers.c +++ b/mm/memory-tiers.c @@ -16,7 +16,8 @@ struct demotion_nodes { #define to_memory_tier(device) container_of(device, struct memory_tier, dev) static void establish_migration_targets(void); static DEFINE_MUTEX(memory_tier_lock); -static LIST_HEAD(memory_tiers); +LIST_HEAD(memory_tiers); +EXPORT_SYMBOL(memory_tiers); static int top_tier_rank; /* * node_demotion[] examples: -- 2.35.1