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=-9.5 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 2D66FC433EF for ; Thu, 2 Sep 2021 18:17:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B954760724 for ; Thu, 2 Sep 2021 18:17:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B954760724 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 4B95E6B0071; Thu, 2 Sep 2021 14:17:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 466F38D0001; Thu, 2 Sep 2021 14:17:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3115E6B0073; Thu, 2 Sep 2021 14:17:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0031.hostedemail.com [216.40.44.31]) by kanga.kvack.org (Postfix) with ESMTP id 20C676B0071 for ; Thu, 2 Sep 2021 14:17:16 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id BFE66183F96A7 for ; Thu, 2 Sep 2021 18:17:15 +0000 (UTC) X-FDA: 78543440430.13.1946619 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by imf13.hostedemail.com (Postfix) with ESMTP id 4676E1025A8D for ; Thu, 2 Sep 2021 18:17:15 +0000 (UTC) Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 182I9rae028702; Thu, 2 Sep 2021 18:17:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : in-reply-to : content-type : content-transfer-encoding : mime-version; s=corp-2021-07-09; bh=VyLIf6Mr4oQDWE9dNzCDWtNTO5HpQ53lcB/8Kta5lJI=; b=rzQ/44DN/LD17sUm7zZA7mX5FbnOodxgt8BkctEgDw+1KiHgk/EOV5UXbnTJwuyPKkpt mj6SaehJjUtE90gUhMVOznPag8/w9oL5aaJcv+HDy1UEDmHBxa/0KdKvgOne/aupyc0/ 7gOB0jhpm25Fjrhc7goVX0MtBvwxGVtuldi4Pked+G2RxC2RwwSjDEkSlZbcruxdtIlU jOjJne4HDtjHyr5nhmcI98LV/pUvrWkVDTDeDwyXHsEHwShyGosCOyD+LDa4qkPHDs0Q dJdzmjHjkkEWzbNKnTZ1hx05WexITddzJpmcF/Cv5A5P2oi4cgxoHvSHSedt8hRTwufV Xg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : in-reply-to : content-type : content-transfer-encoding : mime-version; s=corp-2020-01-29; bh=VyLIf6Mr4oQDWE9dNzCDWtNTO5HpQ53lcB/8Kta5lJI=; b=GxR4hTvNtpOKn2L+FKujh6S02Ix/fPGrwJ1WYnYmIqm/q+USV/ANWrztlHVLeiXW1+zp wKQRMncnjaaZy8lYAO22buDC5Oimwmo+Q/hG+a9dTJXL+KlhzqPEGjTIjgyGSNtIK1b4 sdhoqLaCmA3XJhM2uWs443HWQbo57rjL2ZiEAx84Ynv1HkgMVGdXCflUvHw1YQrIs3vy QtC87Bz7IKOmQOmJIfaJj5D76fG+bfiMlh0HZ//Kx0mTaMeoy3Y5WF9s6UQGrlufLlR4 X9lrxMHX7EsBSNKdA+cKThduFhoUzHYzHAM9fxd1oua895km9jASk7N1izx8KkTgRrhY +Q== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by mx0b-00069f02.pphosted.com with ESMTP id 3atdw0km2m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Sep 2021 18:17:12 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 182IG2gI101639; Thu, 2 Sep 2021 18:17:11 GMT Received: from nam10-bn7-obe.outbound.protection.outlook.com (mail-bn7nam10lp2106.outbound.protection.outlook.com [104.47.70.106]) by aserp3020.oracle.com with ESMTP id 3atdyvxudn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Sep 2021 18:17:11 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ECwJP5FuMsArszcmW0xXpQs60jqQKg9t+Bp64lPBqCGZZcDc2tqF/+vRxunWOQEHI+3wD/QvmuEiLGPWxr8U2j2MeOC1RwdhKUY6dUCtqj/HmSVX7VmKXix8jJrtzEmD/nA49apK9SfUdVPvAfbyV6VYsEW2Bj8E5XJ4UMHOqu0vMQrFi9CKGrftmiZY6tAZyu5EpPB6Brj4biVzg7lHCtJmJ042rAoS/Bpl22GaOR5Ls2iHRYURDQGaSavzQdojlrbiuh/gyhWhUgZ4VDVaCnC+qzL0VfZxoHxf2/Q7TqI4aR/+efMxwsj/ag8QeIXCIomEv+JYtHi+zpUmNg4g8w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=VyLIf6Mr4oQDWE9dNzCDWtNTO5HpQ53lcB/8Kta5lJI=; b=aCr0GUSEVxPMMkPJhlVHL+e/ZtiZW0tk++xlau5/YhxRNOHP9T5UOwgB88Oq/mVM3JRDwNsrzMWcvXrF4D+d4wIC10zDDVkHHLao+0++xCsfWWpAhQqRb75Tu4G7F8XaMx13rTZWhRcKZrB4NcPLLFLcx97DCepp8TI+usdzLzRtch0N5HEbRcBm7r4vB1tEe1Q/EGFsm+XxEpUF4vfiKe/7tU0QqQ9IYeMxCDyyj4ykkRgEbeTlHSJSuc6lD0GKtNxT3MDQYODJojwB/sOXXqcIjO2cSFTqwAJcnfwgObRnjMImGX/BC37L3dkZ9nACJK8Q2eOaYG3lJvmX5qanvg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=VyLIf6Mr4oQDWE9dNzCDWtNTO5HpQ53lcB/8Kta5lJI=; b=tpmtA/fAhQu6L+vDH8jEjCuMsa043QkAGYCnz5ivCVgZoI69CURz6/SM9M8Qg+RxdSNs9EEiW2qhGTtNaNWFBF8RJaIgjMBdCvCLu5sbF9dVh4re2EKkOvF6rUClPYBI6fLGjIR0bSmOvU8b6+nnvQJHOUMnSFmz2/knW4AZEVE= Received: from BY5PR10MB4196.namprd10.prod.outlook.com (2603:10b6:a03:20d::23) by BY5PR10MB3969.namprd10.prod.outlook.com (2603:10b6:a03:1f8::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4478.17; Thu, 2 Sep 2021 18:17:09 +0000 Received: from BY5PR10MB4196.namprd10.prod.outlook.com ([fe80::8d2a:558d:ab4a:9c2a]) by BY5PR10MB4196.namprd10.prod.outlook.com ([fe80::8d2a:558d:ab4a:9c2a%7]) with mapi id 15.20.4415.023; Thu, 2 Sep 2021 18:17:09 +0000 Subject: Re: [PATCH RESEND 0/8] hugetlb: add demote/split page functionality To: Vlastimil Babka , Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, David Hildenbrand , Michal Hocko , Oscar Salvador , Zi Yan , Muchun Song , Naoya Horiguchi , David Rientjes , Hillf Danton References: <20210816224953.157796-1-mike.kravetz@oracle.com> <20210816162749.22b921a61156a091f3e1d14d@linux-foundation.org> <20210816184611.07b97f4c26b83090f5d48fab@linux-foundation.org> <10d86c18-f0cf-395f-4209-17ac71b9fc03@oracle.com> <2d826470-d345-0196-1359-b79ed08dfc66@oracle.com> From: Mike Kravetz Message-ID: <02a1a50f-4e7c-4eb7-519c-35b26ec2c6af@oracle.com> Date: Thu, 2 Sep 2021 11:17:06 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0289.namprd03.prod.outlook.com (2603:10b6:303:b5::24) To BY5PR10MB4196.namprd10.prod.outlook.com (2603:10b6:a03:20d::23) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.2.123] (50.38.35.18) by MW4PR03CA0289.namprd03.prod.outlook.com (2603:10b6:303:b5::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4478.19 via Frontend Transport; Thu, 2 Sep 2021 18:17:08 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 405cdc5e-074a-4193-f4ff-08d96e3de0cd X-MS-TrafficTypeDiagnostic: BY5PR10MB3969: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:9508; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BY5PR10MB4196.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(39860400002)(396003)(136003)(346002)(376002)(366004)(31686004)(53546011)(31696002)(26005)(2906002)(16576012)(7416002)(52116002)(110136005)(54906003)(316002)(186003)(4326008)(8936002)(38100700002)(2616005)(8676002)(38350700002)(956004)(86362001)(6486002)(44832011)(5660300002)(66556008)(478600001)(66946007)(36756003)(66476007)(83380400001)(45980500001)(43740500002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?NXE3UXdqN0pSZGRtcnBjczNWdmNVV29DM1FDSTE2YzI3TW1FVzdUVWJvQlov?= =?utf-8?B?K3JvTVprKzNsaENYOTlJQVBYcDRUNzRQdGdrRDExRmFkaHREbStiNjR0MHVl?= =?utf-8?B?ODY2MzZ0Tm05VXI1eDNmOUwrMi9iU0VXWXZJeVdDN1o2ZXRSY214ZzBjMzN0?= =?utf-8?B?ZFdmdFFlV2Z4VGM2anJTSjlsWjRGUllKT2wwUVIrZGJyVTdFRkNKclVScmg3?= =?utf-8?B?K2pDb3lUaElhWGZ1UTNFaEh5QkgwSGNTeXdPeEROZVFIS1dON09Yd1orL0pY?= =?utf-8?B?ZzNGWHBpeUxnU2VJU3lYVFRIbEJPVU9rL2w0QUhXdTRITjF6Tm9uRExiSDE5?= =?utf-8?B?TE1XY2ZuRnpubjhQL2pGelZ4dVFHMVltRXArMjkwWjhOWS9KNzBWdk53ekMz?= =?utf-8?B?cVZiRDZVSlJWNlhxNW1BWkNkeWpoZ3hPNjFwbGVHMnZhU1FkWGZEM2J6QUhY?= =?utf-8?B?N2Z2U21KaTNqMkRINzVDRlpQeVMyNnVCREZPM2pWaUdBSk5WSTVYbG10VGtl?= =?utf-8?B?bzFPREZBRlV1RGJJWVl4ZFhnUVo2WnowR29xbUh3SWVXMVUwZjk2elBvRm9B?= =?utf-8?B?UVliTGhSaXBsTnJHWGVsckx6Z3BOSjFpenFRdEdJZ3V2U2ZUaFdWVXRxYXNt?= =?utf-8?B?bSs3OWo2YjRmRmJlV0RTODJueFZmc2o4b0Y4V29laHFaeFErcWFITjhLSHE4?= =?utf-8?B?eURTNm9HVzZLeTh4RittajRPalVnb1d4ZTVPWnZYckdZcURHQXBXZWVTa3hQ?= =?utf-8?B?WVA1TjJycXNxRnpTTkNiUjFKYVNObm54YkVKbmtZSlVSVWtNbnNUUXo2MlFw?= =?utf-8?B?K3kxTnhaZUNhRUJWclR5NzVNcXJ2MHhBb0FpS0xyUFhMdFJma1FuM2hVckRM?= =?utf-8?B?K3BjMytkT2tQaHBFb0t5c1ZxQ1ZpRGY5VkxuTFJOM0p3Z3hQV21xN3JQNHM2?= =?utf-8?B?aGtvTk8rWm4wREdDZ1VPYUNhS0ZQUS8zL0xlRXFhaUNiTFRLYzk1LzdUVHVS?= =?utf-8?B?V1RLeHlFUlNxUGYzQUZxcmo0alROSzNXOXJzYlpBMjNyNk9iSUFCbjNmZzlH?= =?utf-8?B?MG13ZkdWS2ErWmN2T0tmQVZFUEl0MnZ2c2VmV3BndDZOR2JHWTBQNmhFYWZ3?= =?utf-8?B?ZS9jRUlhK3MyV2NIYVlkYW5zaFVSV1oyM1dQWHczdDFpT0FxYXdQTnFBdjRz?= =?utf-8?B?MGo1WUVaTC82WE1qY1hrWEp3WFcyUzBJUzNhWVhoa1NZd1Y0Y1Jqb2pMUHRM?= =?utf-8?B?NWhGTnlkbmtPY3Rnd1JULy9icmxISUxvRXRvRjgvbDRMcHE0Tm43NEwvRWpR?= =?utf-8?B?RXJtY3cwdW1NUURvdncwQkVjQVl1M0duZDZoUGJJMWR4WEhQZHFNMmNIS0ZK?= =?utf-8?B?UllSaUFabUQwNzFFUWo2bnJPRU84eVJVaWs0UW4yU0NnTDE0dHE5R2NHNGR6?= =?utf-8?B?RGRickgvVTRVbzN0MHhWN2x3YjlIZlh0OXh1THRUMUpNN2lZUUY3c2crNVZH?= =?utf-8?B?dC9Za2w1dno3L2ovUHlRNFF3RXYvc29EeEJVaXAzUWRPazYwaXFJYUlCWENT?= =?utf-8?B?dThaUkFuQ0FkYkNMeG93NkRieENaWXM1UVQ5dWtKc0E4QnJocnBPNGF4VUVI?= =?utf-8?B?dDdFeE1XSGtpV2laTU44K28ySVhIdTloVkNKZHBnRStpRittMTRxdjhlWFR0?= =?utf-8?B?dGw1Q1RTOWlEOFdRMUdwT0cyVHE5WXp0bHpWUTNoQUttYnAvaDI3ZzNwNytE?= =?utf-8?Q?NXjDGrtLN6/2eWwQzb3H4MCOTQkg8BTsUwkpkz9?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 405cdc5e-074a-4193-f4ff-08d96e3de0cd X-MS-Exchange-CrossTenant-AuthSource: BY5PR10MB4196.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Sep 2021 18:17:09.6237 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: TewdsISW7UWTF4aAc7kPj1IQCYq5tSr9rdq1qfSJ5XJYPt88ja1oTg5zZSua/iVaNsBBhotC1C2cNM3etlfY1Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR10MB3969 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10095 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 malwarescore=0 bulkscore=0 suspectscore=0 phishscore=0 adultscore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2108310000 definitions=main-2109020103 X-Proofpoint-GUID: aSJRTpnA-Rb1uKiuiSYj8RKdlMHq-fMY X-Proofpoint-ORIG-GUID: aSJRTpnA-Rb1uKiuiSYj8RKdlMHq-fMY Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2021-07-09 header.b="rzQ/44DN"; dkim=pass header.d=oracle.com header.s=corp-2020-01-29 header.b=GxR4hTvN; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b="tpmtA/fA"; spf=none (imf13.hostedemail.com: domain of mike.kravetz@oracle.com has no SPF policy when checking 205.220.177.32) smtp.mailfrom=mike.kravetz@oracle.com; dmarc=pass (policy=none) header.from=oracle.com X-Stat-Signature: 4qcwefspnusthapbrmze3cibx3cbp7mu X-Rspamd-Queue-Id: 4676E1025A8D X-Rspamd-Server: rspam04 X-HE-Tag: 1630606635-721828 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 8/30/21 3:11 AM, Vlastimil Babka wrote: > On 8/28/21 01:04, Mike Kravetz wrote: >> On 8/27/21 10:22 AM, Vlastimil Babka wrote: >> I 'may' have been over stressing the system with all CPUs doing file >> reads to fill the page cache with clean pages. I certainly need to >> spend some more debug/analysis time on this. > > Hm that *could* play a role, as these will allow reclaim to make progress, but > also the reclaimed pages might be stolen immediately and compaction will return > COMPACT_SKIPPED and in should_compact_retry() we might go through this code path: > > /* > * compaction was skipped because there are not enough order-0 pages > * to work with, so we retry only if it looks like reclaim can help. > */ > if (compaction_needs_reclaim(compact_result)) { > ret = compaction_zonelist_suitable(ac, order, alloc_flags); > goto out; > } > > where compaction_zonelist_suitable() will return true because it appears > reclaim can free pages to allow progress. And there are no max retries > applied for this case. > With the reclaim and compaction tracepoints it should be possible to > confirm this scenario. Here is some very high level information from a long stall that was interrupted. This was an order 9 allocation from alloc_buddy_huge_page(). 55269.530564] __alloc_pages_slowpath: jiffies 47329325 tries 609673 cpu_tries 1 node 0 FAIL [55269.539893] r_tries 25 c_tries 609647 reclaim 47325161 compact 607 Yes, in __alloc_pages_slowpath for 47329325 jiffies before being interrupted. should_reclaim_retry returned true 25 times and should_compact_retry returned true 609647 times. Almost all time (47325161 jiffies) spent in __alloc_pages_direct_reclaim, and 607 jiffies spent in __alloc_pages_direct_compact. Looks like both reclaim retries > MAX_RECLAIM_RETRIES and compaction retries > MAX_COMPACT_RETRIES -- Mike Kravetz