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 115E8CCD193 for ; Thu, 23 Oct 2025 17:48:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 68E9F8E0010; Thu, 23 Oct 2025 13:48:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 63EC68E0007; Thu, 23 Oct 2025 13:48:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5061D8E0010; Thu, 23 Oct 2025 13:48:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 3B3878E0007 for ; Thu, 23 Oct 2025 13:48:44 -0400 (EDT) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id E1744160C36 for ; Thu, 23 Oct 2025 17:48:43 +0000 (UTC) X-FDA: 84030114126.18.F33A957 Received: from DM5PR21CU001.outbound.protection.outlook.com (mail-centralusazon11011024.outbound.protection.outlook.com [52.101.62.24]) by imf29.hostedemail.com (Postfix) with ESMTP id 2628212000E for ; Thu, 23 Oct 2025 17:48:40 +0000 (UTC) Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=riN5kN7K; dmarc=pass (policy=reject) header.from=nvidia.com; spf=pass (imf29.hostedemail.com: domain of ziy@nvidia.com designates 52.101.62.24 as permitted sender) smtp.mailfrom=ziy@nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1761241721; 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=uB2vWcSw2Kh+/zGViSUn8FTLR0RJLubYIVDGb3rrXyM=; b=Zwnh1LDsDpHuEToLsXyZ5Ig6LOeLggh3Ou/Iok8O+/bPS4+lFYWssJXajrNraMijBUItLa MyZKOIsix5xH1eMM/IkIElfwn9hrKFR5XBfwWMKeIaRF7bsGPnClSpU1OXlXYX4T1bRoSG pq0RYjHOcqtBzlkted1G1LgIzuePHHA= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1761241721; a=rsa-sha256; cv=pass; b=sYwJStSum+hvcijFe3e87g76cakSn0KsUDeap43/v45PYwoJ5Cod2zu+i6/JIgRn0lp4jw mjtaDF1ucD/TTKjb88o0XQopoRZZrUcxE7uEQ/sfgbZ3ofpet/fat6OhenUyX6DjC+IOl9 fOFKS7itfiSdfs3FvX7M0bh1Ka8KDuo= ARC-Authentication-Results: i=2; imf29.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=riN5kN7K; dmarc=pass (policy=reject) header.from=nvidia.com; spf=pass (imf29.hostedemail.com: domain of ziy@nvidia.com designates 52.101.62.24 as permitted sender) smtp.mailfrom=ziy@nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=YqnycgLTwNbEPvbSGreQVwBLqZ5qaTFzhW3kLw+a9sHqv8z2jjUkFXLqYF2xsnbBVqDa5sHxNFr3kXqzGehFVpuXkL/I1B+m/IMFuGVpbXRW2giAnRIG6xei0y3uNGd3io6LMUiOIgcgvwPPTjGh622zLvNXjpCn/u8nZXJcMkqdWdDR28jlVZ+ymjliMB7kMrKUWX6o2nkGTZQgVYlFQoip98MJaGKxm8UClJRCGzLWaFF3AyhbemHrh8ULZKAklIbQ8FCiSbEaWdar6iQ5HhoFu1XO3MTBwHy5fMI3ol2GzNcsPmEH/FI93VJUZn0teo2EALHKPV5HKESWD5VNKA== 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=uB2vWcSw2Kh+/zGViSUn8FTLR0RJLubYIVDGb3rrXyM=; b=tT5bYJKuXbnYXCgG7ibh5cFbIqQVkWsUlgSDSuTKZHGHFAAULkCg2BVsDfPnCRGjTNwFyK/WI68iXsyFQbz9zF/9fvJ6sqE4bMCD7JpQh0Ol8HvHt4vLVfvLln8rPKqd9LJBzCbPHWBMT7mIN0ekE3hAfuzlpNuJh42IEA6n4wVxPiclqDFUrl1ks/7Gv4WMOADUsbhQLosOnJSR6JxB1LBm55K6gpsbCLM5jSLbKgR/WXjBoNL6ilQOdvDxKqz8Ir0258uugR/KaHewdD65mAbuPsGmi//aJ+WLTmXXmDiN/MhB+EQ1A+H80Lu4a10Xp/gGn0EMmSBziZvJHZ1Xzw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=uB2vWcSw2Kh+/zGViSUn8FTLR0RJLubYIVDGb3rrXyM=; b=riN5kN7KbWPysVkRo8R3DrKMLWPN2PbYYUPtRGm3j5Mi66NKu5UcmybFgtRHgGIycyFzQJDlK3+iTTdV/0EZ6AOjSpen7D3ewoNIVPQw8pGKmjxOvGckeLoMMBarXU8pu/No3nXH/Xkz5/tzpwgDnrSslTlEruMfHsi1iXp8ZnXEiBHtPcy1xxBHruzfCI/tTMN+j/Zco/8iJoNgVJ3sqeaQdFa/j9+DyDveZc151rcKTezcj1fCATaqUVQOMn/KnB1+6DhGr+GYhoZdroiTlNCqCRwgCsLBrpWvGWfpmlquh6taJV3ZqYB5PnHUECqHVV4dV8b0SIvv43NgWtXrTw== Received: from DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) by DS2PR12MB9750.namprd12.prod.outlook.com (2603:10b6:8:2b0::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9253.13; Thu, 23 Oct 2025 17:48:38 +0000 Received: from DS7PR12MB9473.namprd12.prod.outlook.com ([fe80::5189:ecec:d84a:133a]) by DS7PR12MB9473.namprd12.prod.outlook.com ([fe80::5189:ecec:d84a:133a%5]) with mapi id 15.20.9253.011; Thu, 23 Oct 2025 17:48:38 +0000 From: Zi Yan To: Kairui Song Cc: linux-mm@kvack.org, Andrew Morton , Baolin Wang , Hugh Dickins , Dev Jain , David Hildenbrand , Barry Song , Liam Howlett , Lorenzo Stoakes , Mariano Pache , Matthew Wilcox , Ryan Roberts , linux-kernel@vger.kernel.org, Kairui Song , stable@vger.kernel.org Subject: Re: [PATCH v3] mm/shmem: fix THP allocation and fallback loop Date: Thu, 23 Oct 2025 13:48:36 -0400 X-Mailer: MailMate (2.0r6272) Message-ID: <22878093-1EAC-42B3-A962-24204628466B@nvidia.com> In-Reply-To: <20251023065913.36925-1-ryncsn@gmail.com> References: <20251023065913.36925-1-ryncsn@gmail.com> Content-Type: text/plain Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BL1PR13CA0175.namprd13.prod.outlook.com (2603:10b6:208:2bd::30) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|DS2PR12MB9750:EE_ X-MS-Office365-Filtering-Correlation-Id: a51e56d4-4140-480d-c6b9-08de125c658c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?gWpLhMotM4WH2jR2GW0oTPcYooXSeOoaX4m7P0QljZY78OsijYL2DHShADM2?= =?us-ascii?Q?Dz+7kg+RMLZFz846YFpihgHKu4EK4JX2dOpyBpXCVij9nie7bwox1AajI+Sv?= =?us-ascii?Q?pZ1Vgj/uFBkf10cjpivc5LESWN6Bzfp/wdJKf5X3ovy5daLSwj3F5ut/60gG?= =?us-ascii?Q?OMVW4ISg9LTP50/aHVJfIP33AeieGEPFoZef+wbuPxGsaBptVJGfAKM4V350?= =?us-ascii?Q?wS+zU/EY9tA2nMqWeuEeHPZykYm7mxPXJQopA4qldWO2s7Bqa95p4I4apU+W?= =?us-ascii?Q?pbP1+YRzeQD7tD7aUBLz8WAzcNBnUxn/ZHM9TnsJP3Zpj9w/Hvl0WVZGJsCs?= =?us-ascii?Q?tAUdqDzpcrcvQox+f/JHiPxF4OkWYUo9h4en7TdbZ4Txasx0BgaxsuGJg44+?= =?us-ascii?Q?clyVJewFaz9E2tFuQ9aUDITwJ7cyVcdvfkV368opOzxe2bxe3dOD7QzBTj4w?= =?us-ascii?Q?NEv3SPgAgE3F+3ZAa1vvcu/jxYk5b5kGMoXu1DVTO7mqi6dY12pWy7zZpmaI?= =?us-ascii?Q?mcw3mmehRRCyipGPTJsuGwilAHi+4BQY0wSAL4PTDpQ4v/x5tZ3Jy1V4y6Mw?= =?us-ascii?Q?MEQ5o44dSd9Hj4kKuSQikihVisSBbpzzpXGem5VIjtVIRHsolzHmgG3Fp//z?= =?us-ascii?Q?J0yz2wRgN1YB8fzHbbDZX2c7MjqjLBMOnhS1ZqRY6UuK4CvSM+NTaQ8ysFIE?= =?us-ascii?Q?vf7/AE6Aw1iJ+CHeAXuDD/UdoLPnJ7U90ZiMgu7yGQTkiXAvwtoKzNcgjPah?= =?us-ascii?Q?m9s2ArxiW2qz6y+r2l2Nx+bIR3lxD7hRUgKJlOOgNgqJDS9ZZg4811m4ROZ8?= =?us-ascii?Q?6CUOPERMROMxlDY6133LhE6KIpCkvg8rS2sMoSd+scHEqZPSbJMBW1e5XIfE?= =?us-ascii?Q?CpYg0nLX1xQR3VVDqOUQ5asEAGSRKg7RnWhw4ND7UyUgwP9RcvSdhrvyxywT?= =?us-ascii?Q?znUTKC70evw6pReRtwIVuBeG7H+hidkiBV0SvtWKu4D1xYRtlODS2UZfryLG?= =?us-ascii?Q?MBMTGNJKXBAXEFdgEK9zGFXIS0W7SWeW9L7eiCRjt6dHaRnvtnF5/cg/8FmR?= =?us-ascii?Q?XVnpoBYqg3QKRgIofjJ+390XMgFFaffYBv8HHlReHAx0210uYQbLGAi2rD3W?= =?us-ascii?Q?pJ0Z95toQVBJlTuyarhAG7aIhQzqn6INHNcmENhI+eX3kSxZppyUTkJzdtYW?= =?us-ascii?Q?pfXz+3fJAG4fRHgFmVXevBHfuO7Ijq4Q8K1bplYRy2TeAQh8IDfJvkingfO+?= =?us-ascii?Q?6a/irFC1w/kFG8qWuGbORuzua1CT6HHpWe9id1DM5HZGPRjOaGhaNsD3HPRW?= =?us-ascii?Q?h/8j9zKWGKol57mQm0Es1+jV7WWyjl2i6UcyPlnDUsEOgjPJHeJg8gwOr9FQ?= =?us-ascii?Q?xpW9U1zZbGpIFiH7yYqJbtcLUD5AjK4s5wovsjfkNeYZQpLI+I9hA2hv70JN?= =?us-ascii?Q?n5CwL/mxToBHj5V0GxjD/4jzy4j5Zmw0DbFiOu6tOoZL5vCT5nT+gA=3D=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS7PR12MB9473.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(7416014)(376014)(366016)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?IwnT0HteDfYSOM5WwEgAwzPtI98ywYK3c7jU+JdyflcjToUE5Z0rtK9FdoQH?= =?us-ascii?Q?AUUEmr99huQGSnGB6/EDqwQUrHU2yBLPnjLlNNvVhDNY9Le1fQsAmVfjjH0T?= =?us-ascii?Q?LDv41Zocxi+8Ptoc89MZCaq8y83unumffAQDza+TejhLlf/XWCgm5GefDGJ+?= =?us-ascii?Q?74Dwh4HAXhg2JwqMmadIi9OZVU3YskW6fDhsjJy/oURXQjTHVzyXnkaC3DDn?= =?us-ascii?Q?nsJkEvgpkSHaxYQ7paxTtRM2BO2f+vVHL6JbctnLynouEIaoA6hxrFy0ykJE?= =?us-ascii?Q?wmMkkflKkZ1emXxmcXYBwccXeZW89fpiBI17QzQ5+0cybMqAFen9rQD0vw5A?= =?us-ascii?Q?65ObRzh6Hkd153wFdQUjaCqLksaHlpYJgUpYbP9Ov4oVsBg9dflg7v/ZXPbG?= =?us-ascii?Q?qt8ZvV/VukcBFQoSzgPBfV8OqPA2Ms3Vt4RntctJPYeb4pmjl8aoTh5YACIZ?= =?us-ascii?Q?TOKP/kLqM8jLLUZYq4uLflkQ8Lf5iFsSH4t2Jo9MpUdbn3xOzKdrUW+s7q+m?= =?us-ascii?Q?GzqKDZrucDBJrzMixQ1BUIZXj7/Xh8tHTA5w1Nzp+YkTMnmz7oWsKH68UdyV?= =?us-ascii?Q?S6H19b8aRx99VKmhm/5ehLbhe/RuYX+xmhBKod+wwYY/Heq+Z1vsM/ISigpV?= =?us-ascii?Q?WfTxePqeU97bxLXL50RErRz2Eh33h7tvbS8hyq2h/XZ/ElZRYhdf7DujT3BE?= =?us-ascii?Q?jCMvD0Mk2QH2RBv2upQCrulWYIc8N4qZq5USBVD19hXjVRRj6USmAFnip9gO?= =?us-ascii?Q?xj5tNgVUKwU4gmPNMvtjZyS+I4RhJMhQufAnBKbbGmvXZ4sxQ6iBAkWhPEyH?= =?us-ascii?Q?ImN8D2LjrhI2nS54NlTCXXi3/uwRIOFf5SDS9eoQzzK5vxfdMwAhqlQK2XZi?= =?us-ascii?Q?cXUKml0iKyrc7hMzwz44sTONyw7rFLu4mLSzp0KNWsBTkW9AjOgjxoIeDJ0T?= =?us-ascii?Q?w8a2am+0AVOenpmgT/As1toQk9bBAYm+0k82wyX+gOlPqe9iD+4BPEVPfOkI?= =?us-ascii?Q?76oC+15U6rA7A88omiUD44D6EV0o81SpM/FwPYhMy/Mof4r4jx3Na83XhS5d?= =?us-ascii?Q?G7gYf0+n4cdBQ96NkxjFnaA4ve/fOVnUwsEx1QLVmIJWIgdOCRvVU73h4joG?= =?us-ascii?Q?rZ373Dqz18K+8RHRT8s9Z96ROwBud0JEHpQRiUeoCGziVqTTqamhZ5iiEJ4r?= =?us-ascii?Q?5k03ULX+HhPKqBAkuuFofoW2/N3Mzwsb6MAol3Ipn5l9kI2INP7vPBGglKFP?= =?us-ascii?Q?CdUGkHMSPhBXjBsotoKDeR2dGovqR8U8v0B291X9ByWUQhv+k1XJTuQw4aZr?= =?us-ascii?Q?+G17Z+7sljpU9yYftYBU1+aTWA7XTqCkniOQJVYjEdxw8lCcfIj5smXpPkn4?= =?us-ascii?Q?mR0cFvpZewJrZdpoZd/wYWaMCB3hfm9103DHa0ujbbKxZ+ehuBruryKDZ5hS?= =?us-ascii?Q?c4yxcIhvKfEar3bZQZq0YQtErqxV9UFN6quaO4CY3JBbplHysjKjhKdYU0UO?= =?us-ascii?Q?UGlmc5Z/IA99xhbIhHCcc7WsUNyz5BaCrAaXj/mh0TdHZsmtLAjnMGl8pFnh?= =?us-ascii?Q?uuq74Eut4QskOjY/0oy+35qh08ZwA5FHmlQ18ZIc?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: a51e56d4-4140-480d-c6b9-08de125c658c X-MS-Exchange-CrossTenant-AuthSource: DS7PR12MB9473.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Oct 2025 17:48:38.4531 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: gVSrq/mXsioWdzISCfAgsKGREIIxbWqRWj3PHmJ/+LBfqfpjiXNekqD8jcJ9D658 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS2PR12MB9750 X-Rspam-User: X-Rspamd-Queue-Id: 2628212000E X-Rspamd-Server: rspam02 X-Stat-Signature: xh8ajwidxzin4x64uh4gq7gsz3mndx9u X-HE-Tag: 1761241720-56432 X-HE-Meta: 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 SQ0K4L53 EocPx+QPZZ6aW3Qx5I7PchHIfGVHNJvwym/LcMac8t9GIiXmWZXDt22AhygGnQCijvCok5fXYGJ1ypjgzNahhOVzth/mtV0TwqbZ6J+za3oOG0DRnL6/ygBgmuTtDCK94+sSPrpNIicUtpLJmGzsecL6SzgTwTgAruAcEuytcNFpQKVfy7+dga4BDZt4/hsvrvrOFs7PM5h0m5EoqKHNU0wGmAD4wt5VTgtE7obWGRRnr9KkfiWySfMoAXX4dmA7CQgrf2jQ6eHdRws72G7DvL6w+9DGKuJOIuYk4yfnb4ss+crQ1gl8Yl3fu2n0EZFiiBK+T8wXO27oYmB2RytzBf0j37JyJzCTjFKJlCWdcXGuM5rMkgLpCXC5ZHN1LmKr+RMt2hut7DBEwVeM13c39nlET1SulTWYEHW4T0H+GyPSWAvlXSiHxqEApQSvuPbijO6Ag1jJ5uFltkqw= 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 23 Oct 2025, at 2:59, Kairui Song wrote: > From: Kairui Song > > The order check and fallback loop is updating the index value on every > loop, this will cause the index to be wrongly aligned by a larger value= > while the loop shrinks the order. > > This may result in inserting and returning a folio of the wrong index > and cause data corruption with some userspace workloads [1]. > > Cc: stable@vger.kernel.org > Link: https://lore.kernel.org/linux-mm/CAMgjq7DqgAmj25nDUwwu1U2cSGSn8n4= -Hqpgottedy0S6YYeUw@mail.gmail.com/ [1] > Fixes: e7a2ab7b3bb5d ("mm: shmem: add mTHP support for anonymous shmem"= ) > Signed-off-by: Kairui Song > > --- > > Changes from V2: > - Introduce a temporary variable to improve code, > no behavior change, generated code is identical. > - Link to V2: https://lore.kernel.org/linux-mm/20251022105719.18321-1-r= yncsn@gmail.com/ > > Changes from V1: > - Remove unnecessary cleanup and simplify the commit message. > - Link to V1: https://lore.kernel.org/linux-mm/20251021190436.81682-1-r= yncsn@gmail.com/ > > --- > mm/shmem.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > Acked-by: Zi Yan -- Best Regards, Yan, Zi