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 69861C04A68 for ; Thu, 28 Jul 2022 19:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232731AbiG1TFf (ORCPT ); Thu, 28 Jul 2022 15:05:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231520AbiG1TFa (ORCPT ); Thu, 28 Jul 2022 15:05:30 -0400 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F24A371BB for ; Thu, 28 Jul 2022 12:05:29 -0700 (PDT) Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 26SIqXCu032622; Thu, 28 Jul 2022 19:05:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=lFenJdsVELNWeajF2epdtoWy5bSL9jInArYw6QYM9Rc=; b=siMfNBHbU0L8W3O0l3aNeqfenbmGUr9Q1LDaGIFLYYfP2qKvEZ3x6EuHY0RSSQBSD6sp jbxN+I8ap/g/P9NHUgtiJ7KICwbIm4sAlTGJjDIq2FCfWu272HO/+cg5vhM6/7XKygEb 7V3Kv0P9E1Hx9zrxgmGCuCRfhv8q+PP3Yqagph01Z7pUy840q35NI7zt25gcT2olV5KM /F1fDgHjlAngtVORZbRxN9gJyVuBcthDAC43OPXbvs9PCQM2144ARRZMQLYitwb2tHf4 OZgSOZpsCDNLYyHDy7+OrB16e1Hn45T/cwUWjkU+fhhChr902KdOwxZMsIgblPF3R7pD wg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3hm04c0brc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Jul 2022 19:05:15 +0000 Received: from m0127361.ppops.net (m0127361.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 26SIr2eC035826; Thu, 28 Jul 2022 19:05:15 GMT Received: from ppma04wdc.us.ibm.com (1a.90.2fa9.ip4.static.sl-reverse.com [169.47.144.26]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3hm04c0bqn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Jul 2022 19:05:15 +0000 Received: from pps.filterd (ppma04wdc.us.ibm.com [127.0.0.1]) by ppma04wdc.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 26SJ2VAk017301; Thu, 28 Jul 2022 19:05:14 GMT Received: from b03cxnp07029.gho.boulder.ibm.com (b03cxnp07029.gho.boulder.ibm.com [9.17.130.16]) by ppma04wdc.us.ibm.com with ESMTP id 3hg94b196e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Jul 2022 19:05:14 +0000 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 26SJ5DXf36962772 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 28 Jul 2022 19:05:13 GMT Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7C59C6A057; Thu, 28 Jul 2022 19:05:13 +0000 (GMT) Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CD3856A047; Thu, 28 Jul 2022 19:05:07 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.43.25.218]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 28 Jul 2022 19:05:07 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: Wei Xu , Huang Ying , Yang Shi , Davidlohr Bueso , Tim C Chen , Michal Hocko , Linux Kernel Mailing List , Hesham Almatary , Dave Hansen , Jonathan Cameron , Alistair Popple , Dan Williams , Johannes Weiner , jvgediya.oss@gmail.com, "Aneesh Kumar K.V" Subject: [PATCH v11 3/8] mm/demotion: Add hotplug callbacks to handle new numa node onlined Date: Fri, 29 Jul 2022 00:34:31 +0530 Message-Id: <20220728190436.858458-4-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220728190436.858458-1-aneesh.kumar@linux.ibm.com> References: <20220728190436.858458-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: r1htYXv7501eBYj7l7SnioIOfDv-vXHi X-Proofpoint-GUID: Nat__jd6zEOrK0m-YntgAhvHpM2kA7gg X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-07-28_06,2022-07-28_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1011 impostorscore=0 mlxlogscore=999 adultscore=0 phishscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 spamscore=0 malwarescore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2206140000 definitions=main-2207280086 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the new NUMA node onlined doesn't have a abstract distance assigned, the kernel adds the NUMA node to default memory tier. Signed-off-by: Aneesh Kumar K.V --- include/linux/memory-tiers.h | 1 + mm/memory-tiers.c | 83 ++++++++++++++++++++++++++++++++++++ 2 files changed, 84 insertions(+) diff --git a/include/linux/memory-tiers.h b/include/linux/memory-tiers.h index b85901c0caba..976f43a5e3be 100644 --- a/include/linux/memory-tiers.h +++ b/include/linux/memory-tiers.h @@ -13,6 +13,7 @@ #define MEMTIER_ADISTANCE_DRAM (1 << (MEMTIER_CHUNK_BITS + 2)) /* leave one tier below this slow pmem */ #define MEMTIER_ADISTANCE_PMEM (1 << MEMTIER_CHUNK_BITS) +#define MEMTIER_HOTPLUG_PRIO 100 #ifdef CONFIG_NUMA #include diff --git a/mm/memory-tiers.c b/mm/memory-tiers.c index 03e43f3dc942..c9854a394d9b 100644 --- a/mm/memory-tiers.c +++ b/mm/memory-tiers.c @@ -3,6 +3,7 @@ #include #include #include +#include #include struct memory_tier { @@ -83,6 +84,87 @@ static struct memory_tier *find_create_memory_tier(struct memory_dev_type *memty return new_memtier; } +static struct memory_tier *__node_get_memory_tier(int node) +{ + struct memory_dev_type *memtype; + + memtype = node_memory_types[node]; + if (memtype) + return memtype->memtier; + return NULL; +} + +static void init_node_memory_tier(int node) +{ + struct memory_tier *memtier; + + mutex_lock(&memory_tier_lock); + + memtier = __node_get_memory_tier(node); + if (!memtier) { + struct memory_dev_type *memtype; + + if (!node_memory_types[node]) { + node_memory_types[node] = &default_dram_type; + node_set(node, default_dram_type.nodes); + } + memtype = node_memory_types[node]; + memtier = find_create_memory_tier(memtype); + } + mutex_unlock(&memory_tier_lock); +} + +static void destroy_memory_tier(struct memory_tier *memtier) +{ + list_del(&memtier->list); + kfree(memtier); +} + +static void clear_node_memory_tier(int node) +{ + struct memory_tier *current_memtier; + + mutex_lock(&memory_tier_lock); + current_memtier = __node_get_memory_tier(node); + if (current_memtier) { + struct memory_dev_type *memtype; + + memtype = node_memory_types[node]; + node_clear(node, memtype->nodes); + if (nodes_empty(memtype->nodes)) { + list_del(&memtype->tier_sibiling); + memtype->memtier = NULL; + if (list_empty(¤t_memtier->memory_types)) + destroy_memory_tier(current_memtier); + } + } + mutex_unlock(&memory_tier_lock); +} + +static int __meminit memtier_hotplug_callback(struct notifier_block *self, + unsigned long action, void *_arg) +{ + struct memory_notify *arg = _arg; + + /* + * Only update the node migration order when a node is + * changing status, like online->offline. + */ + if (arg->status_change_nid < 0) + return notifier_from_errno(0); + + switch (action) { + case MEM_OFFLINE: + clear_node_memory_tier(arg->status_change_nid); + break; + case MEM_ONLINE: + init_node_memory_tier(arg->status_change_nid); + break; + } + + return notifier_from_errno(0); +} + static int __init memory_tier_init(void) { struct memory_tier *memtier; @@ -97,6 +179,7 @@ static int __init memory_tier_init(void) __func__, PTR_ERR(memtier)); mutex_unlock(&memory_tier_lock); + hotplug_memory_notifier(memtier_hotplug_callback, MEMTIER_HOTPLUG_PRIO); return 0; } subsys_initcall(memory_tier_init); -- 2.37.1