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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C0C60CF8561 for ; Thu, 20 Nov 2025 08:53:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E487E6B0062; Thu, 20 Nov 2025 03:53:54 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E200C6B007B; Thu, 20 Nov 2025 03:53:54 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CE7E06B0088; Thu, 20 Nov 2025 03:53:54 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id BA85A6B0062 for ; Thu, 20 Nov 2025 03:53:54 -0500 (EST) Received: from smtpin19.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 6BD774E725 for ; Thu, 20 Nov 2025 08:53:54 +0000 (UTC) X-FDA: 84130372788.19.16572F7 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by imf20.hostedemail.com (Postfix) with ESMTP id A2FCD1C0009 for ; Thu, 20 Nov 2025 08:53:50 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=njM9LnNo; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=YkuCDjcE; spf=pass (imf20.hostedemail.com: domain of harry.yoo@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=harry.yoo@oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); dmarc=pass (policy=reject) header.from=oracle.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1763628831; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=VRxWnSBQGRxPa/50NmSGC4OmoStFLQgz7oLKKx8W65g=; b=RYm0b+xPAdKyrnwnP/tWA3ghd3zrPiQbczZSEVmDtZqul3/+r/hCyxicA5XjflcwnngomD ejs5HJMGHpRN0UGxJrxUof04/QwO9bgFESU+RY32lvpB7SsvJulxnItM3XqYa3dxDdNLWN UuaeNVGz15JIQXcAYSCinErzv8AuYVQ= ARC-Authentication-Results: i=2; imf20.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=njM9LnNo; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=YkuCDjcE; spf=pass (imf20.hostedemail.com: domain of harry.yoo@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=harry.yoo@oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); dmarc=pass (policy=reject) header.from=oracle.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1763628831; a=rsa-sha256; cv=pass; b=AsH6AIGF0bdLgIcQ8Z9WXQRbYC4WSvXmIDGceGIeIzOgFLc1hPAulPJOA319KzmVeTsmTu JtwHJBMzCsMHCUOkq1DkSBV5Uoe1vvmIjeFGwPntikbJe2PU/+oNWUGSU9+ckIGTZgFzWa sw8JB9XJd1NUlpHDb0i4xjWz4JcYGHQ= Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5AK8qCrn007779; Thu, 20 Nov 2025 08:53:34 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=corp-2025-04-25; bh=VRxWnSBQGRxPa/50Nm SGC4OmoStFLQgz7oLKKx8W65g=; b=njM9LnNokFq5HtuRUM8N+GVVjPWnnHM6hV eHUMy73fFlpKIZfcOvyEIeIKGbFbRqLeWh0x3mQQB3IUsGx81mSbYWD+nxvSSY8F 2Bz7rqSlhndVGZFRCPX7JJAtn03XGzWU6xhapp8q989nE02a39NMvqtRuagSPuUK JPhlfZg+H40rYK4Zvd6OUR6R2h0GhjtWuOB55Ls6a83W4oU77w1tSryW6kBChH67 2amGd02kufBdh7SrIZ1EY6B/lfSdHTJY/rdWNe8XaRAX4smPjI9/ptmEisqDnOCU asBR97pL33a9+EFQTSgx9ujW9B4Tf95DQqHsD9/c4UDdx4qh1CAQ== Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.appoci.oracle.com [138.1.114.2]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4aejburhmu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 20 Nov 2025 08:53:34 +0000 (GMT) Received: from pps.filterd (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 5AK6tQto004350; Thu, 20 Nov 2025 08:53:33 GMT Received: from sj2pr03cu001.outbound.protection.outlook.com (mail-westusazon11012040.outbound.protection.outlook.com [52.101.43.40]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 4aefybh44x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 20 Nov 2025 08:53:33 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=BMT/bRFvx8dh8S+KqmE+29Rt79BgW6Z7DwxiKVwUd0C0WLzB+nu7iqQ4D9RJMaej3w+QjyA1bqgbm0U9pYg8xaM2/5+KbNlugG1ESAJRAw7AURRE20sGAgyL9HmR+UFHvpEIqPVgWw6XXgLgEDAf2eCGspe7xEytPPyHsNmI8Xw/L30zEV/5rs8D2EdQqynyJJ4LVy/3DgzfcbbJP2ii7LLiTDFvM5GnrqqVLhS8Ys6uBGrwKlKXAORgUda4jpTitWKYymQdrAc/uz1WMbGlTpJIw0Q880VQkEsDSWcCFR4aWJxsiwSbnpOyFZSjYWBATWwZFNC1Si9gWcjyoQARhA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=VRxWnSBQGRxPa/50NmSGC4OmoStFLQgz7oLKKx8W65g=; b=gXBmkQRQuNa6VgcQDCL0lRrKElcECk2ITg9TgdtFsYZXfOlD+LFO9EU3tE7yvpn3bwbWusMvEg3940u1bgtxiwfxtXAk59+dt+ACSOHDrP+ku3Wh3fmoBs7CIU9BcvhiLvR7kM4Az5OTi/lAFUM1SWa/OrYDE0UIMps8GiBUoKKxmeNm3A6BqqEhmlCXVuBYZZQh459WcN6qBJvQz1JQYFbF6nqLjBLDxd/NtmOGsYvMIJUUYWKnTk1VIlTohhMBoSPwExNCUMcA+6E9a/QqT7S6Rctge62/ohalwp8VTj4w0pgDeapDbvdabRMeet5hY1jHX3Sfy3DIIfxBuhCgpQ== 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=VRxWnSBQGRxPa/50NmSGC4OmoStFLQgz7oLKKx8W65g=; b=YkuCDjcE7EYnPz/7IcnBLCbeB66QDRcry8gz9LXi0mxHOi6BeSQxKVQteVMzTEnjSU9UBcdQl8mmTZsAoRx4c5+PQipFSKY+GKt/e2AjMasII92h1aD01dl7M6Oz3FVeZa4Hh0FYYToLQf/lqMuUhmXoRfPOgtCL3z9EgIHKHGI= Received: from CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) by SA2PR10MB4553.namprd10.prod.outlook.com (2603:10b6:806:11a::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9343.11; Thu, 20 Nov 2025 08:53:31 +0000 Received: from CH3PR10MB7329.namprd10.prod.outlook.com ([fe80::f238:6143:104c:da23]) by CH3PR10MB7329.namprd10.prod.outlook.com ([fe80::f238:6143:104c:da23%5]) with mapi id 15.20.9320.021; Thu, 20 Nov 2025 08:53:30 +0000 Date: Thu, 20 Nov 2025 17:53:20 +0900 From: Harry Yoo To: Qi Zheng Cc: hannes@cmpxchg.org, hughd@google.com, mhocko@suse.com, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, david@redhat.com, lorenzo.stoakes@oracle.com, ziy@nvidia.com, imran.f.khan@oracle.com, kamalesh.babulal@oracle.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, Qi Zheng Subject: Re: [PATCH v1 16/26] mm: thp: prevent memory cgroup release in folio_split_queue_lock{_irqsave}() Message-ID: References: Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: SEWP216CA0130.KORP216.PROD.OUTLOOK.COM (2603:1096:101:2c0::8) To CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR10MB7329:EE_|SA2PR10MB4553:EE_ X-MS-Office365-Filtering-Correlation-Id: ebcbd2a9-781c-4e75-20f4-08de28124771 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?BAQx3Zlh6HdURt9sfK+perQs/+ylFF8Ppc784IPBKpiF7MlOO+7yRW/ibkRE?= =?us-ascii?Q?o2isAydJ95W897nsz6di7A2YNyN8/V1A+sgVNZhAtIQo9dHxARdJWd7ckVTq?= =?us-ascii?Q?9FWEn0nblV9Pon8WOVCx5n0TVuSE7p0a50ERFVvYs5nspdFMvj8bQLZIXhMq?= =?us-ascii?Q?hF9KLhH449L+uHuHlE6SM2ip3oJWaDbEHRN2DmF2jDnAtHHwFWfhPPljEpbW?= =?us-ascii?Q?2eK4UQYMuCi6SlfTHezpQOzVZgidye55nasymrw6bgAgS0AGyfcmevcmV91F?= =?us-ascii?Q?CZU9QeF8n4KWHxQIB5L5/gPdttCfckMuL2c4e6Sv36lRILnp7lu2R49x8drM?= =?us-ascii?Q?uFN9xhXkYxutrf1kREDoSfYtNccu5Unhyj4eXhRgadcxit844UgzqB3jj8R1?= =?us-ascii?Q?Pajpp0zJ8S/va5MR5ymId8hdr/1fUTlUwSjuk0CstR62VN3RgA5/5/s5Az0D?= =?us-ascii?Q?JntBY2pl76V+zgwQ7OY4ZNskIfPHnUJ5E1N4LKOPHYR2oI89iKuwSVQtXJvt?= =?us-ascii?Q?hSNmk5h6OP+VDr5nhyOKWBrdFVqnYMJEbptUvHvY3lhz/W6KaTOd+B9dZVKH?= =?us-ascii?Q?0XynlSSSNhN6Jpz8T7U5f3nyq7uGAVo8BAOP30qfZfSbkcJphknI5CnxwDg0?= =?us-ascii?Q?5jXvoT5FJ5+nFkeEolUpXX6iy7Ff4jDWNzgzJUN7wzVmpqsOASMb8/hk1kK5?= =?us-ascii?Q?jHIEO0lkfmz2J+i+xjfnRqnQq9BRRji/CP20WOSABGiv7aqkchAiJZ1nnWRr?= =?us-ascii?Q?N6qwJjWiulKEmTWCLi0Qy7daTJK/ohL18axBG4ScV9jYo/XZGRbK3iNJnrar?= =?us-ascii?Q?p/hNo/Bgrto+XblEGkvdHFu8UL0H9pJvueLXsumPhIK6yOPXPpUP3pAvQNMp?= =?us-ascii?Q?tIGyk7oA4ND55jcW32s2rbyWyWd8cyDPC3ekFqGNFCjPuBD6OiR5jDUCnTBX?= =?us-ascii?Q?J2rzXcIfI84wbL97mqzYUxYNvkuX8Uf1+C9pb+KY2lsgdBdiy4XwKrJI5I1C?= =?us-ascii?Q?kwWuzXNx8LG4jAAVg8zYIR3nH4w09lge4faNqosssTxVNCE1oNg22Ov8i1dB?= =?us-ascii?Q?kQCn1K2ybNGtCOSqljXGnCOqc6gaUjnDi6pGBcVKoDg28UWqzoy2nqJRxxPJ?= =?us-ascii?Q?hbquaTliog0ZogGPDx0U9u6Hew2P7/pnJid6XOcd2R7Rc89KLFs5n8eCuTNN?= =?us-ascii?Q?q88sn7DVSmC1+WrN9E5sV840GNMUXW7msCelJSh4djYePODTw67VG7Rl9rYl?= =?us-ascii?Q?AdLWmCkYJBFreIko1TKcD7YJRJChbAJDUHc97AIaFoNmD7amR1e+dDKj2t7w?= =?us-ascii?Q?A/e+1hBuprlbsxbNU991dw0hbAyepvUUfL3YsHlF6HBbMgxPL5ZtM8oh+ewe?= =?us-ascii?Q?JidAMwtaoQh3VpqUMcyvXVzQqbi5jreOA4D7e2UEN3IqCWDLuPV3j6/aWwmI?= =?us-ascii?Q?X3S1KTAJZmlPI8KddcDnhqDFXnBwkmB4?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH3PR10MB7329.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(7416014)(376014)(366016)(1800799024);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?d8Me+kNN7njqe0dK3Q0QZLPsP36vfzEqH7c00desMv8LjF9gBi3yGzLoSERb?= =?us-ascii?Q?EBO7M7suqI7sFgpQ22EV17HrcEnObxiL9rolVAk+plRx9A7CZjqwDXEOASAA?= =?us-ascii?Q?xjPqNtMyryjY6Z7spjXxAKkXKxs2Fnf3NpMRpQfKhxfveJOuYSSqCcEjh1XP?= =?us-ascii?Q?8t2ScZ7sqGCY8oxEkU9Ws1qPEiyiJK5nKvt+MeTG+ky2ShrlgXVrlXUQJKRC?= =?us-ascii?Q?ssUZy7E4shhJ7aQ9QHvtoleKcMEPYAaStQDHizKm2ncThTbAGUyT0Nor7H9v?= =?us-ascii?Q?kfRA1vpjKKw9LR1x3C1fQxjqvhB+blAEmWq/y4FCgueZM/iT9eBexngNEzCM?= =?us-ascii?Q?k22s+3SkNLQ/BClWkmofQDpKIx16cRg1Y59wcFLCLodPuPgvFPOGHm3v/Doo?= =?us-ascii?Q?A9BBoQ3RurBWO3LQYIRhDwoUkCo/WMeMF8Z/5bbxzV4jtN2+v/xbQGH1sqsl?= =?us-ascii?Q?3yKZo567FCfgahb//uQ3o52YMO3PKCfOsrj3jrl+0yh147ZgNF6WdhAHYa/2?= =?us-ascii?Q?99iNV/ybO6xp8SpTwD6UVgb3NQnfHQXedYCkpsIBu9RpS879CaVAVMHAKIUW?= =?us-ascii?Q?7il03920Qv2XqaYZbnuC20XGfLrFRtv4VipMGFFHfOPXdBxo0zzdj+OD606S?= =?us-ascii?Q?KSRvxojTLEW5UHLWqMLEsN0qck+ObMwrL12a5bE31QCc3Z2+JLxt+EHSP4RH?= =?us-ascii?Q?ZqSXV3BjhU5RJsdsFIlj70mlzpg2XxmlEQT5RBwGnD848yb0KKy/8H9tL4Rt?= =?us-ascii?Q?LBkf/pzwHNFuyvxb2ALgfsb0tAR2it20MGQZcSXcKkucZyXnNQp+u9AXrNSJ?= =?us-ascii?Q?qWOVQEcBuePpGr3QoXmmFF0JdLty7v/6LkqJ19imWL3Ifu+FnIMMySi4AO7Q?= =?us-ascii?Q?3i7lM4m+umDpUSOFwGGKg7xSuMHMkyKl/MpCwSnSxx7r+qaApssKm3LAc/fD?= =?us-ascii?Q?qsnaoQvNMutbsqdBkGXHz781l8MJKEGvhLAc8Cd/c5pZZ/lgwQp2udLZnMPy?= =?us-ascii?Q?adh9GnA0wQQ9jxzaaBOxY0GkWzNgH8TVCPkktokM7x7w0ZxqLWXFDsOo1bJk?= =?us-ascii?Q?vyiiPIpwAJP5bGGuVObNcql2t36FGRtgnYAQ7jAiSP05TqC5d6CjRZaL1bm5?= =?us-ascii?Q?g2UaokFdyB76i8sVFsXub3smexi35iYkjSXzl3G25ESbflG0IQV5wILjCjyE?= =?us-ascii?Q?F5GjJ1/hC7V4xSN5jU6aNPRypX906x0h8E6f9uI/7V1/fudzqpR2t/6xv4te?= =?us-ascii?Q?uf9YTvLkJXrzqhWutdPWsLgxVCt/1hFUA6Eeerv6P1g+fvHAQiuurf8gpdZL?= =?us-ascii?Q?IlNxDwP7CfOpVlBVffL/xeLFW3it+Tqp46ULPdj654493P55Pp6t0MRiNuWT?= =?us-ascii?Q?mULjofJYDiLM+CIChxZHshjuEmJaItCeRLCSOsGWR1/4OI7TQDUEqjC63r7Y?= =?us-ascii?Q?dyKvLZND5pJTXuhy8ziECNIXmbFeQoX9oxYPE8QGBxzWtqZjUIieJkDJ+F1S?= =?us-ascii?Q?N3Dttp8zIUJrqf4pD24mAVSQWOU0CFA/uo6VXg/SwMMb5bw1ZcWm4xoYypwZ?= =?us-ascii?Q?pLHfKlwHCc6q4ZDVlLyzhvgMIhR5CEsyZoUMXK2xKQyVoL/Ru6S3laOl4Cki?= =?us-ascii?Q?AA=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: ebcbd2a9-781c-4e75-20f4-08de28124771 X-MS-Exchange-CrossTenant-AuthSource: CH3PR10MB7329.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Nov 2025 08:53:30.7873 (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: GnH8sqfSmbWzYbsoHohdajAqlM2z9CtGbP4SWpAgJIqUap/yT27MGqqDTJWmAG0ABW6t4jTZaHUkB+jGl7CQNg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA2PR10MB4553 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-20_03,2025-11-18_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 mlxlogscore=999 suspectscore=0 malwarescore=0 mlxscore=0 bulkscore=0 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2510240000 definitions=main-2511200052 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTE1MDAzMiBTYWx0ZWRfX+4IcZFDMi6Q6 qsGTGfzKo9GkCJpQLJQXuZdO7NR/uiuPgZnMga/SImklKvPBsfyP4oGjujFUyqJOICOtUFh0FJl IAep8FVD8yrZL80TF0Wq43FiOkv/GaXONlZDeGphu31Zi2xngrIXNdM8GR+z9C+QKRva+k2WTTw pd/XgpnRNMub8CpHUTz9FiCgzMb+3AV6l5bb5wRNROXrOBKD5EZ0SKOMw7phTwWjcQIQMjF2e62 ymPfrIeUL/e2bLr99wlNGNXuKTaZoaMnkxYe6HXWsG7Bc3UR6WcnE0yff9P0hmYTUAryq1M1ElK O/+w0YArF4romat5CdytquvkRh3X845x4tHSNQEZwabeTBZ70v8MLTdRBkW53yp2kpJemCCD4kj fKmf1/pjUoGGHig2Bj0+2sW5XSrLcw== X-Proofpoint-GUID: Ik8NE6z6Yz_RsWE4lxTveUJkn70eEuQe X-Proofpoint-ORIG-GUID: Ik8NE6z6Yz_RsWE4lxTveUJkn70eEuQe X-Authority-Analysis: v=2.4 cv=Rdydyltv c=1 sm=1 tr=0 ts=691ed70e cx=c_pps a=XiAAW1AwiKB2Y8Wsi+sD2Q==:117 a=XiAAW1AwiKB2Y8Wsi+sD2Q==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=kj9zAlcOel0A:10 a=6UeiqGixMTsA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=968KyxNXAAAA:8 a=yPCof4ZbAAAA:8 a=QS2uWFhkPXxkyW2GHEwA:9 a=CjuIK1q_8ugA:10 a=ZXulRonScM0A:10 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: A2FCD1C0009 X-Stat-Signature: 859b4g5ot5gzjjdjgrr4b1nr7g3ohra8 X-Rspam-User: X-HE-Tag: 1763628830-810389 X-HE-Meta: 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 jQdljgc5 g7nnwWWdxVENH6h+Mp2rAd+y4EeUXdM3H6Lk3ax77qxlZ3AqBJ2mQDbOjDpq1n4/jNvaBrJzmghk6rApClPt78cDMBNT0q7eRSho7tmDilXeTP5gCM8UsJ0AbGVguKCTX3HMrtRigg5dwI2kCx+52331dw3Q4Vxt2axypgNIJ+TEa3uHF1Q6GTOR0T/AtoM3wefmli1OrmDKE0SGTK8yhA2up5EbX2DWq8hehwSpSOOiHmlwJJ7Eo/v3NNLopDtIVNwtANuGgbkgcslwc2LaVpWlkbdifHzc4ewz+FAyzX1ztaHMdZwrNSpFhggKdc32VoQXomGdb6DMAvigWl7bMQeVvYiLKcFWMH/QVykcK50IfUStbzF487XXxLInYlldrAySfz676FMuMLbuOrfnCDA+gecjZDt345UuPL3nRhpIwK7e/0K/prbBunREto0lOcuVY0tNjU14gwosCCe6TRf/G8lTK4axGxwpF0FEqBmmRdcv+F0pf1rkqgDLJSqyj26V9O158E5cRLFVVzm3j3bQpEr7/wx+/uiSolRJFd6EWNCMbe9yhvTJtSKXdesg6jyJJfrj4Ok24Db7rKLYc5LRLvNhi2ABkPWrWuu9sUj76Dq3iMxBebZrpTg8PrzB0Q2c/HFOTfFWBlZXianbZSoiflC+SFuyP5+nc2jTjU6dWGbAmfKh2IZoB32asUEKMdtoXfuI39BLd3eUp/KuS/9Nz1avBK/w5DflIjEC4kL7Hj7Vk46AajiTzzg== 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: List-Subscribe: List-Unsubscribe: On Tue, Oct 28, 2025 at 09:58:29PM +0800, Qi Zheng wrote: > From: Qi Zheng > > In the near future, a folio will no longer pin its corresponding memory > cgroup. To ensure safety, it will only be appropriate to hold the rcu read > lock or acquire a reference to the memory cgroup returned by > folio_memcg(), thereby preventing it from being released. > > In the current patch, the rcu read lock is employed to safeguard against > the release of the memory cgroup in folio_split_queue_lock{_irqsave}(). > > Signed-off-by: Qi Zheng > --- Looks good to me, Reviewed-by: Harry Yoo Yeah, once we acquire the split-queue lock, the split queue won't disappear under us because the reparenting logic also takes the same lock before reparenting. -- Cheers, Harry / Hyeonggon