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 B126FCCFA1A for ; Tue, 11 Nov 2025 18:29:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 195868E000D; Tue, 11 Nov 2025 13:29:30 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 146618E0002; Tue, 11 Nov 2025 13:29:30 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F01268E000D; Tue, 11 Nov 2025 13:29:29 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id D3B158E0002 for ; Tue, 11 Nov 2025 13:29:29 -0500 (EST) Received: from smtpin14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 7C02B139441 for ; Tue, 11 Nov 2025 18:29:29 +0000 (UTC) X-FDA: 84099164058.14.B52057B Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by imf21.hostedemail.com (Postfix) with ESMTP id 19B561C000D for ; Tue, 11 Nov 2025 18:29:25 +0000 (UTC) Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=bdwGAnjz; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b="o/qHc5LA"; dmarc=pass (policy=reject) header.from=oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); spf=pass (imf21.hostedemail.com: domain of harry.yoo@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=harry.yoo@oracle.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1762885766; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=1U++WbYsWfAxGRHAH86cLdHFj6vEcd3Rg6ZDLWrvLIk=; b=n5dLjwiN0NC+KL58RmPF8o8mzunzHHiXCk0pRyn4q7YRH5vGrD+GDIhzR7WKHXG1rzjbAX NUrzhm8hFWSIWLg6j+SnYqxbS+Zv41PrPgIEfwiSnfcNwJe4SYv5iFyW41ScMR0NTIYcC7 zZFJlukvxkOVPz6pJsNqJFy+Y1tZKTk= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1762885766; a=rsa-sha256; cv=pass; b=PleqLQiBlJriR3PwbQjgTBWt2IpYKRoiQ/sP4gzc9v9OMQ4QjfzWSNHfVFfCyIfSESpTlw N2qVNaI6dyt7rklD0ajV72qmD5XZgM1xFaFM2xNeu+7DB6sxFmJCFiJNBe+MOJ9AeEwNxI gSpv63yVD8wh8RPuWsu1JGWM4mLO8FM= ARC-Authentication-Results: i=2; imf21.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=bdwGAnjz; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b="o/qHc5LA"; dmarc=pass (policy=reject) header.from=oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); spf=pass (imf21.hostedemail.com: domain of harry.yoo@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=harry.yoo@oracle.com Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5ABHw4K8012618; Tue, 11 Nov 2025 18:29:19 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s= corp-2025-04-25; bh=1U++WbYsWfAxGRHAH86cLdHFj6vEcd3Rg6ZDLWrvLIk=; b= bdwGAnjznHX+PSzM2TxydXUgc6WXcJ246ISOtDL4T4q4o0k5c2Iebrwm58Dwbpua 7pNNBYVc3Jk6jmGFmMPm44AnrFp1bf0r7cmNLmQlzWPlbPNAxhF7yfPwiNy9WG5m nbeNIaocozpTJXim7ITIybTpuDzLPlm5jJcmZBukp5tGF6NME8EZiILmY3wO+mIn WefJyLGVbvMXGJZKO8siIGyYr6cGbUGKZn1BWHuHbByPsGg2+VOfNjFRHBZ6Baje udVt0H7TsRa01kfjF5++ECcU+8YRlH8JVbu5M8MwE4aWxkCYbD3E4O8mO1BhtkIP AUXJ30MmmrOBh1Mf0kW2xw== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4ac95mr4jy-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 11 Nov 2025 18:29:19 +0000 (GMT) Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 5ABHLA4X020364; Tue, 11 Nov 2025 18:26:35 GMT Received: from bn1pr04cu002.outbound.protection.outlook.com (mail-eastus2azon11010030.outbound.protection.outlook.com [52.101.56.30]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 4a9va9sw28-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 11 Nov 2025 18:26:34 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=m6bgCYlV1BNtxtkqSEUftEpOTF0pa4Wgw0/1x1fMRtlN2wunNKAjsXsT4Ax8sXzuJRU7JgmVYOemVtzz1WZ7GYCVTuy7lJVfv0U6O6IW6spJta1HXmIVqn0OAwCiE9qMu/IyuLl79K8IUsXE9lGoixfMhDpEZgfgicnlcPcZaARiHdONJQ6mrPnYSjujbMsEpPby2KWTVF4qOcZk63AHm14JauNgNVS4/sPtRinFW/mP/bXif05VNYvqarcCkby9301l2iQjvd352b0fBq1hFfOEOpBDACmCPwuj4KPXGYgAOB62kmNxT1lFGgx3hSdGeVYolsRITVJq1AA154c2VQ== 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=1U++WbYsWfAxGRHAH86cLdHFj6vEcd3Rg6ZDLWrvLIk=; b=eM+JNk/gdoiso2h3FnWO2MMlooo4pga68r2xYJx0RMfzljqr4hd9oz6wfT+O2fxkN9vj+SP30TRyiPmgI3AJ+82kw+F/9aXSl1BmusO29u65c/XafzedRckvwA33kUbLzAA46IImjg8XMqev2/UNYrSl3d26zsIGest2oQEBHmzRxZG4QkoUZC2wsV46XjE3dDVXe6DILKCATY5uGXZkbhY1iWdeW4bKLoPNFHkGezzzbO8L+lThN+U5SKGkNrynNOauAru1rxq0y50LzT0ivCiWumWxLSol0hVgYl8a+UTOtBJVkvOzmu/mG+wyJ5nEW1IFh3RGySaw75vMBwC6HQ== 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=1U++WbYsWfAxGRHAH86cLdHFj6vEcd3Rg6ZDLWrvLIk=; b=o/qHc5LA0nhTykTEpx066dMtcobCcRFeakChfzR5GjMgN6x7lXIZEDqSkDa/LbOA0+qeylOFV4BPLg8piC5ae/hSZNZb8qG7Zf038INyU8XsNx8W7LA/Z5BP+bLKLUNLSqQhzYFuaYkgP2ZBwmTfcnV/BoSO1rFDV9MWmhOhfeY= Received: from CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) by CY8PR10MB6586.namprd10.prod.outlook.com (2603:10b6:930:59::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9298.16; Tue, 11 Nov 2025 18:26:30 +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 15.20.9320.013; Tue, 11 Nov 2025 18:26:29 +0000 Date: Wed, 12 Nov 2025 03:26:24 +0900 From: Harry Yoo To: Tytus Rogalewski Cc: "Liam R. Howlett" , Andrew Morton , Vlastimil Babka , "Darrick J . Wong" , Christoph Lameter , David Rientjes , Roman Gushchin , linux-mm@kvack.org Subject: Re: [PATCH V1] mm/slub: fix memory leak in free_to_pcs_bulk() Message-ID: References: <20251111125331.12246-1-harry.yoo@oracle.com> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-ClientProxiedBy: SE2P216CA0141.KORP216.PROD.OUTLOOK.COM (2603:1096:101:2c8::10) To CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR10MB7329:EE_|CY8PR10MB6586:EE_ X-MS-Office365-Filtering-Correlation-Id: 3c20b476-d161-4435-d904-08de214fd517 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?YTBrSG51VmRYb2NMYi9sT2o1eHJOS3pHdW9PS2RJWWRESko4cUFCMXdEczVS?= =?utf-8?B?UFVRTEorSkNKODRsOXpmWFNmZVNzZUMvc2luakYxdlNRSzlsTGQxcGVjZDZU?= =?utf-8?B?MG56U01oNzAzN1RwcUxoWks1VXg4cXFhZDJqU0VlZDhNWUZudHp3NXNxTU5h?= =?utf-8?B?YmhKRjhsRmlsdUtETzdvSjhWRFZvOUJVWEtnYXZZYjk0Nmh5Q3pPZmJNakdI?= =?utf-8?B?WVJiOFlXZ0RKakFvY2xnWEtjMGZKcDJMYjZpRktDVzdZU1lSNkZJVVdSQ0lG?= =?utf-8?B?bHBzdmVvbFV5ZUYzbkZuS2hNbWc5Zy8zSHplYnQ2SThqR2JVYml5SXpFQTQ4?= =?utf-8?B?TkhYV1lVbjdlQkF3ZTVIbFFqVy9FdmpGb3lnU1dUcmkzSmFXSko1TTY5SGxr?= =?utf-8?B?SnM0b0ZyQlc3QVJOVHQ4TXR1a3V5bVRJVmRTU3VDMm9qVnlQdjBCeG9xMUw5?= =?utf-8?B?RWRySzE1MVVIbGJiNXF3elY5TmVQbUdqWlpGL3BsVHhoNXN0U3NsV2laR0RD?= =?utf-8?B?dTVwYVVMc3o1SHhMdE9SSHR5bGNiTC9BdGVLNmZqME9nVUhPa3BXYkZleG1X?= =?utf-8?B?SjA0N0xPVzFPY0NnVFBiREhzWUJKOTZodHNwSFhjYi9ZcHo4MDVoMkpLb09s?= =?utf-8?B?WTdFdjdwSC9JZWJNWkQySWJETWFMaGY2Tlh0d1dBaG5ZK0tiZ01vdng3bXdZ?= =?utf-8?B?RUNUWUdEY0Z0SmNDdk1ScER4dFV0QzkrOHo0eTNaZWsvYlNuNXZLcG1Rek5y?= =?utf-8?B?Q0d1cERUN3RxVjl3VFZ6d1VEbnlzdlRUUkptQ2tXNFpzbXJ5V1dXTjFWWXVF?= =?utf-8?B?U0IydCtCWm83cWl5RFduRnJ5QUpnMFVpZmpPZ0dGM05iQkhncEd6RWtTNUdP?= =?utf-8?B?cW1XSTNBQmRrNWFZWnorb1JaVy9UOHROcTdLT3BOdklGOWR5V3dSUjgxV0xK?= =?utf-8?B?ZWVxZ0xKUVVaT2dPc0JsTVlyUHIzKy9IZS9yTUhtL3VoUUZhV3ROOGF5akhT?= =?utf-8?B?KzgvVGhwbHk0QUNSWGdsY2YrQnlTSVBDRWduM1NMZnRRZDI3blprL2xZVmlU?= =?utf-8?B?SnQ3NmY4TlY2VnR2a0hqWUEvVGh6ZXRxWllaSUM5S1FNN0dOMXdtdEpqUW1L?= =?utf-8?B?bU1xY1J2L2lVOTVZVDRFcVFVa2lreU14dWswMHhJaEdsblFUVVMrcVNnVEFD?= =?utf-8?B?VFJsT1E0ZmhJZitDWFhRc0J2Um1Mc3hQQ1Y0bFNPL05lZXN1UEg4eWpORXVk?= =?utf-8?B?YW1jeW1aSTNhL0xud25EZEs4YVFzYnQ0N3dDNEF1Y2I1TE56ejBBcHhhbUJa?= =?utf-8?B?QytMWXJYVkU3Nk1JZGZrTDVlcTBsRTFhM1BQazhCRkNrNXhJN2xxRU01aEx5?= =?utf-8?B?c0FQVXA3UTRZd2cwTGhQalFHTThkQnM3RnRzWmM4L2QxZlF2eGtuQm5QQ3E3?= =?utf-8?B?UnhrZTFYSUdqbnBGUW9KZTJKK21kTzRGcWEzUWtxZDloaStuN0hDandObXNq?= =?utf-8?B?QktreU5jTFF5SnpzeitKWEtzQlkwa1dwZElPWk82N2dxYzVUc1BlVFViRlEv?= =?utf-8?B?QjlZbHBGR1l0THBCcUdQcDNOVHpWbWlheXpWc0xUeno2RTg5NTVwWkZlbFZt?= =?utf-8?B?aHBUU3BpQ0lkUWVJOU9CM01wWlZWRURydXJ1LzY0TXdzeHdWT2dEa3NKRVVw?= =?utf-8?B?blFWVXFMQ2w2RTRGdC9nT0pYRzdYaDhlaEwxK2hUelNFNGtTTWR0WkNmdTVh?= =?utf-8?B?eGVieHowQjV1ZTJVUnY4ZlJ6a0ZCT0hQRFFZeElZVlNZYWFFRGd4QUFNeE80?= =?utf-8?B?Rm5GRXhDOStMOE9RWHFyU2xTWGNzQmtuNmpJRFY4WWpPYnRJR0p6QkRhcjBy?= =?utf-8?B?a3htOWI4L1RPZU5xZ0EwNEYwcXpKaU9NTGV2ME5PcFB6aCtWQ0IzTzduMzdU?= =?utf-8?Q?4IXz+N2ThtE=3D?= 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)(1800799024)(376014)(366016)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?UDBEY0g4Z1VQb3dRb0ZOcTM0dDVGMDFQbStMZzJOb3U4MUZNdUxHT2ZqQU5t?= =?utf-8?B?R0NOcmtmY21DdzVIc1dIL01kSTdOTjBPR1pzQTk0OUVKcEtJMjE2YWt3elQ1?= =?utf-8?B?SFJ2MVE1ck5pM0xiOUxlTFo0OXVGTDYwWUpjYmpEVjR6Nk9qRlBCbUxtU3dJ?= =?utf-8?B?N2JXS0tNYU1PUlloQXVtVFUwL3dkYnpUTHl4THUrWkhaeXZFZFI5SzE4MWdD?= =?utf-8?B?cndkZFc4VTZaRVR1UVVHRzdCa2NiT01TN203anJ4M0M2dkdSTzkwa3YvQys4?= =?utf-8?B?bUlLc2ZpN0ZZc1EzN2hYSzhWdUpSSU9PWExSaVdoRXh6Wmh5SHJPMTFIL2Zn?= =?utf-8?B?bTRmWE9aUFlUR211OGRTdDV1VmpjOHkvb0tPejRiRVZod2VWQzF4UUc2K0RH?= =?utf-8?B?N0hMbS9hN2lsTXdyTVkzbmZoUDY5bnZiNUVVVTRIQ1JFQ1dhTmhzclgxRURI?= =?utf-8?B?Rm9NVXBOdzRZSU5RcXRXVlFkZ2dOVVBTWE9FWVBuZjlxYlZvYjNsQVJWQmNG?= =?utf-8?B?OVA1RFBTY3VmN1JVaFJVTUt5SmM2ZmF2NGt3NU95aE5lNmFEcDZVSnRmcEpr?= =?utf-8?B?bWt6ZXJYS2RXR1NvSFdnT0gwRkc2eC92RHB1VGFnamNONUdUaVFCQVh3QkIy?= =?utf-8?B?Q0NTTVVGT3poU2tMUFJMbUh6V3NIZjNHWEwxUUlPME53S3RseXNDc0Uvckt0?= =?utf-8?B?OUU0bnl0clYvWGZhc2w2KzFzdVhPTmRZbFRJMkE3WE94ZzkyNXFvOGZIcHFl?= =?utf-8?B?Y1NWMDRGSUVqSCszVEJROVgwU2JBSWo2bzhxeDZZQUVUY3pXSXRIN3JES2hB?= =?utf-8?B?ZGpvbUVQYXZPMlJrMytpTnl1UGEzazVjZEJrZitQTmlEcnVyZklPMEtVYkls?= =?utf-8?B?TVpYRXFQU3lXTDN1WS9mbjBsOTJMTVFPamIrYkROelc0dXpkR2dWSWkyQS9Q?= =?utf-8?B?SVYyMUJQT3liQnB6dEdUWEl1QzBaeVZZV0YvSU9MbU1QVng4MzN6dWtXR3p4?= =?utf-8?B?bHhka29kWEwxbWxNaGg4STBMMFp5MHpIUzJLNDcycUhRRUI2TSthK3pqbk9y?= =?utf-8?B?TXBGeS9FajZpV0RNTkZmd1UxdGgrMG11QVpzZzVHbnRTVzNlYlJkV2lwcnlS?= =?utf-8?B?TnpnZmxqYTVWelUrRm5wc0Mzb1dYb3JLaEVXbGRDV1E1OVlCaDFxK0RhalZR?= =?utf-8?B?VEZiQ0dvK0VBTWpZWmRhazV5WUs3RDNKRTRXYWVFeVlYMlJ6eU1wblZpVk1p?= =?utf-8?B?biszVkxoSy95Wmp4YW1qb3RpdmQ0dEVrMkNacThtVHZPb2VNbHZxUWcwamsw?= =?utf-8?B?djJlWEtYZU0zaFRhUHdxcnFKWDFKYWdSUktITEI2ZDhzTmxZQjdXSTIxQkJI?= =?utf-8?B?OVl3UHFDemNOUXNobjFsS0YrU1hPYXJIS0xMVEI2TjFHMEVSK1NCL2lsQjUz?= =?utf-8?B?Zmo5NmNWWXhZUkFQTlZBY3lwbGp4SnZESWtXODNiNnU0NUIxUXY3Q0E5UVNt?= =?utf-8?B?UHVwa084QXpPem1TMUV3TGEyLzVaVTMzWmgxa2pJWjhwTU0xQ2lwRkZHSVJV?= =?utf-8?B?MjlHQjRNTnNMeUFTRWtHeURvd1k5VlBxODZoTGVxZUVkbEJOdDFsMzZLVE1o?= =?utf-8?B?bDRTUTdXQjZNd3k4QkRiRzZVQzlDbTMzL2hERzRhRVhxWHloY1pTNW44d3Bt?= =?utf-8?B?RllxNXVURHQ1bmNidjRCOEVBSno3Rkh5MHZMMXdYYlBxRmZSNlhkZFBrYVVt?= =?utf-8?B?bXhFdXp1elRYeWpZR09qUEdtTmxvWCtrRkx4LzdyeEUxYkxDdE1RaEVsNEdT?= =?utf-8?B?L0Vpcm9BQ0RJVnNJQUQvRi9rT2dUQ1A1eS9oeURGQTlsN092cG5DYk02bFB2?= =?utf-8?B?b1ErY2VzSHNVa3p2QXQ0VC9oOXNZelhxYWs4Z2MwRElOeXlyelhwWTdLTFU3?= =?utf-8?B?M1EzT3FBd2M2YUZKcnVMTWY5MWZVcE5GY0hDajNaYmdEMkVjYStmaGVkZXZU?= =?utf-8?B?cm5JelF4aXFhVWVUNVZXYXNLL3ZCT2liOWprZFhmWFJqZytaTU0zYktveExy?= =?utf-8?B?ekRrdXN3aGI3TXFiYkZzUDhBem9hN0E3WFBjb21mZUxuOXpwSytIbW9EbG9w?= =?utf-8?Q?k5995fCdGkMzIPdC2zwjDI8wl?= 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: 3c20b476-d161-4435-d904-08de214fd517 X-MS-Exchange-CrossTenant-AuthSource: CH3PR10MB7329.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Nov 2025 18:26:29.6701 (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: W4REkJOWYLKsb2amNPo2Ud1zKpDrgQ1a67eHrP/2SEWGgsnqMVzRtfl+ORD7Ers+A/KyOTYCnnhnwIOnnKy6Pg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR10MB6586 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=2025-11-11_03,2025-11-11_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 malwarescore=0 adultscore=0 bulkscore=0 suspectscore=0 spamscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2510240000 definitions=main-2511110148 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTExMDEzOCBTYWx0ZWRfX+DLLr2BK9gAT 1Y9+bSzxduAi/fDBTdHmKtoR6bSRIgUQ6ixqjjidatPNKsy1buFcMuKEqoAQhhkXOnkU97o9u7C oTqlvCBDTvFo3WOucMuz7zbWlCfvHK4AAhHC2k/fYifPg129SpphOmo4wUMPkbvaA75NUdI1eX4 DWKB3/vQZ9eiApwJgGb5Z59ygaM5seCpQw3jmRB+kLlOTpaw021Pii1J1o3bZb6v2l7kiN62MIk 0SvbBRJzOrScTdXksZW5Ep9y48agEwbqyyl/1JaCDHMDO4gH2PHp9AXt8OoKvrQ4nu4QBHzF2xB fJ+DltxrUT62RYvA4TT75lJ54bI5rEs+/Y8AhJ0myp4A7jU4XLb9JnNNghFSltw5ckVvCIEqz4M +FNz7UTQFSZ7xee7xkOp3VCcAL/8LA== X-Authority-Analysis: v=2.4 cv=b+e/I9Gx c=1 sm=1 tr=0 ts=6913807f cx=c_pps a=OOZaFjgC48PWsiFpTAqLcw==:117 a=OOZaFjgC48PWsiFpTAqLcw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=Z4Rwk6OoAAAA:8 a=yPCof4ZbAAAA:8 a=pGLkceISAAAA:8 a=b_xSILk3BH2CphujB5wA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=HkZW87K1Qel5hWWM3VKY:22 a=cPQSjfK2_nFv0Q5t_7PE:22 X-Proofpoint-GUID: m4AtzXsrud4IbCChlfCLoxIeXTBGJnvC X-Proofpoint-ORIG-GUID: m4AtzXsrud4IbCChlfCLoxIeXTBGJnvC X-Stat-Signature: nwdm4ryng14atjchsukg5oojoa56hywq X-Rspam-User: X-Rspamd-Queue-Id: 19B561C000D X-Rspamd-Server: rspam10 X-HE-Tag: 1762885765-448965 X-HE-Meta: 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 K9TTOrnq 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 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, Nov 11, 2025 at 05:48:35PM +0100, Tytus Rogalewski wrote: > Do you guys still need that debug then? > I think this is happening only when qemu vm is working. > > I can get results within 1-2 days. Hi Tythus! Really appreciate you reporting the bug and testing it. Now that I know what went wrong, I realize that `slab_debug=U` parameter will hide the bug, since we disable "sheaves" feature for debug caches. Instead of testing with `slab_debug=U` parameter, could you please apply this patch on top of Linux v6.18-rc5, build & install it, and verify that the memory leak is indeed resolved on your machine? > -- > > tel. 790 202 300 > > *Tytus Rogalewski* > > Dolina Krzemowa 6A > > 83-010 Jagatowo > > NIP: 9570976234 > > > W dniu wt., 11 lis 2025 o 16:37 Liam R. Howlett > napisał(a): > > > * Harry Yoo [251111 07:55]: > > > The commit 989b09b73978 ("slab: skip percpu sheaves for remote object > > > freeing") introduced the remote_objects array in free_to_pcs_bulk() to > > > skip sheaves when objects from a remote node are freed. > > > > > > However, the array is flushed only when: > > > 1) the array becomes full (++remote_nr >= PCS_BATCH_MAX), or > > > 2) slab_free_hook() returns false and size becomes zero. > > > > > > When neither of the conditions is met, objects in the array are leaked. > > > This resulted in a memory leak [1], where 82 GiB of memory was allocated > > > for the maple_node cache. > > > > > > Flush the array after successfully freeing objects to sheaves > > > in the do_free: path. > > > > > > In the meantime, move the snippet if (!size) goto flush_remote; outside > > > the while loop for readability. Let's say all objects in the array are > > > from a remote node: then we acquire s->cpu_sheaves->lock and try to free > > > an object even when size is zero. This doesn't appear to be harmful, > > > but isn't really readable. > > > > > > Reported-by: Tytus Rogalewski > > > Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220765 > > > Closes: > > https://lore.kernel.org/linux-mm/20251107094809.12e9d705b7bf4815783eb184@linux-foundation.org > > > Closes: https://lore.kernel.org/all/aRGDTwbt2EIz2CYn@hyeyoo > > > Fixes: 989b09b73978 ("slab: skip percpu sheaves for remote object > > freeing") > > > Signed-off-by: Harry Yoo > > > > > > Thanks Harry. > > > > Acked-by: Liam R. Howlett > > > > > --- > > > mm/slub.c | 8 ++++++-- > > > 1 file changed, 6 insertions(+), 2 deletions(-) > > > > > > diff --git a/mm/slub.c b/mm/slub.c > > > index f1a5373eee7b..a787687a0d59 100644 > > > --- a/mm/slub.c > > > +++ b/mm/slub.c > > > @@ -6332,8 +6332,6 @@ static void free_to_pcs_bulk(struct kmem_cache *s, > > size_t size, void **p) > > > > > > if (unlikely(!slab_free_hook(s, p[i], init, false))) { > > > p[i] = p[--size]; > > > - if (!size) > > > - goto flush_remote; > > > continue; > > > } > > > > > > @@ -6348,6 +6346,9 @@ static void free_to_pcs_bulk(struct kmem_cache *s, > > size_t size, void **p) > > > i++; > > > } > > > > > > + if (!size) > > > + goto flush_remote; > > > + > > > next_batch: > > > if (!local_trylock(&s->cpu_sheaves->lock)) > > > goto fallback; > > > @@ -6402,6 +6403,9 @@ static void free_to_pcs_bulk(struct kmem_cache *s, > > size_t size, void **p) > > > goto next_batch; > > > } > > > > > > + if (remote_nr) > > > + goto flush_remote; > > > + > > > return; > > > > > > no_empty: > > > -- > > > 2.43.0 > > > > > -- Cheers, Harry / Hyeonggon