From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from BYAPR05CU005.outbound.protection.outlook.com (mail-westusazon11010009.outbound.protection.outlook.com [52.101.85.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 97529346791; Thu, 11 Jun 2026 06:32:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.85.9 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781159555; cv=fail; b=tNJdK9QR152R32Vf9P9x+IaZSDxgjhLKQP99po506y5Bo1Gq4gh6QK/vVfDgeKmKUrqEj4tsDqM7MXvG+PYvAUwe4TQX1M+NxvF84cQmeQtmePKELYyuCb/sse3b6m3LGtRcZ6+hzHu6QDl/RaLgJYFPZYX/l36IAyK1QbPymu8= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781159555; c=relaxed/simple; bh=C8GTcli8a/o9iyea2gwqhPHSASzqzuFuvrea+IPYCBw=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=pQAUEoRWN12zRHKknwWvgEeDXM9GgkmApAxc5qahtzRsQTdyMqjMowUB7XYCWkKHYG0LUDKA2TSG4Wr1tmQAjaBhITFgIYrV4M1EVA16G9R2MGV5Z47YrgGiIFh4vbrrSZgvx97Vgny/S4PBt3OPKzmCOZs4DhXbTyGuOMdIVqo= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=SFiixOEa; arc=fail smtp.client-ip=52.101.85.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="SFiixOEa" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=B/jdDrWJoBcjrkOmE7V5ISpug7C6Lb3l0VGcUrc+mNhlmGcF+DImz2wVuiaH4r9U8pUvDdeTU3U+92VX75ve+FGnBiVbCEzSgzfsv+aWabJsmN00CfEms2WeD+3jH2uBAmZkocilDPxEfW3btLB+4tA+sAV00czu+b1an/Qrt0Ro95iYWvw3eKIOTCtLhuNrwixPWanAzIz4TeUUvGkoKyrSkM2zPCodHb4iAOFb0BaT4TcjqbrIy9BhmB9t+vLSZGKSebWkLff5WpOJbJGVErc7j3QDgNuXy0jhebu92Lf686SydPUHLFADPehCfnOAlOiXrpUhYcBerUgJhh0tvg== 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=WAaywP0mvRZA8v+Co1M8k6Gh2GuEA3wYrPlC0160T5Y=; b=aWtGW5sNNxuWc8dkoUnLbtXJN/8NuafZmMjqevz3MFKsjWASOXZk+r2CDzeA4utgRjAIqOzYUh+MwcPtcd1yf8Btv17Rm/B+jjyUdKL9lIG6yqxu1mTGkFNy5fP39ZGAQXBSwCPJ2Lj9e7+kXunWd3ovVp41rUsJmLo4P1nlKGKWyh3qiULXOVCI7HryINMU/cXEu3jIpLCUsKA1NZ4I52+jdG58RyUZ5kb78jxBDad8t4OGs7jci8hfFUEmfiLll6DLhMDBA/pbgNmFyg5qxB+vtsHKyZSdXADi7qsl7ykfeMkRWLx6mn2+VmfZBtjlCamBmtAIRqNvdXdi+M1QAQ== 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=WAaywP0mvRZA8v+Co1M8k6Gh2GuEA3wYrPlC0160T5Y=; b=SFiixOEawX7Vphux1FNJLBkRp2z+KZ3xJjrlFO82t0n7lazgRAGWqKaWUCxG36tRbCzKU7wpyxDUL1nX8dwNJ+BntC+aSMdMOxFkNACUBEMR8a+Xdc5V/Nh3moqsGzSYk+ECfVzouSLQZ8cYVC09WuPmfr8FUnKLF9gy9PysHqKtldoNuHBwtsOlGFaaZw+VA71vCU+nuKCRTa6abN2gFp4+/wiDScfAQR1ep4H/0XZpyOskl3DY+YR3LhJRfn0UQc206/wuUBBsBNAAHDlh+NgvfoyO9JgstB7w96hSdqEevb3lyCF5Zm14hY4kUviUZl7mIsH9LQUdLKC+Rak1wQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from SA3PR12MB7901.namprd12.prod.outlook.com (2603:10b6:806:306::12) by MW4PR12MB6778.namprd12.prod.outlook.com (2603:10b6:303:1e8::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.92.17; Thu, 11 Jun 2026 06:32:30 +0000 Received: from SA3PR12MB7901.namprd12.prod.outlook.com ([fe80::6f7f:5844:f0f7:acc2]) by SA3PR12MB7901.namprd12.prod.outlook.com ([fe80::6f7f:5844:f0f7:acc2%6]) with mapi id 15.21.0092.010; Thu, 11 Jun 2026 06:32:30 +0000 Date: Thu, 11 Jun 2026 09:32:20 +0300 From: Ido Schimmel To: Yuyang Huang Cc: "David S. Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH net-next v2 2/2] ipv6: mcast: annotate igmp6 timer expiry race Message-ID: <20260611063220.GB848847@shredder> References: <20260609081113.7613-1-sigefriedhyy@gmail.com> <20260609081113.7613-3-sigefriedhyy@gmail.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260609081113.7613-3-sigefriedhyy@gmail.com> X-ClientProxiedBy: FR4P281CA0238.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:e9::17) To SA3PR12MB7901.namprd12.prod.outlook.com (2603:10b6:806:306::12) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA3PR12MB7901:EE_|MW4PR12MB6778:EE_ X-MS-Office365-Filtering-Correlation-Id: 3403de50-82e9-4671-0d3d-08dec783369d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|23010399003|376014|18002099003|22082099003|4143699003|11063799006|56012099006; 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:SA3PR12MB7901.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(23010399003)(376014)(18002099003)(22082099003)(4143699003)(11063799006)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?AcSWVjY6yD1sjYp/rZTBqLUjFy9vgr65rBvVM/lvOVuksIozUpT7oV/nTREp?= =?us-ascii?Q?pDTZnJy53d/jpSoR83r+l/SWuT5k2ZcWaZf+Upp8ns7D37cQXy+77bR5gN7W?= =?us-ascii?Q?6Llj0fNrube9/+iIu8UQOK4MVLFV/MgiSwxq/KVQd+MsZxzKJq0F5Plg/xEu?= =?us-ascii?Q?/dpkcoGR+BuqM/vwAYMZ13TLlm4TGCEDsHRssLxJsX2g1/6phjmir+ySmL+g?= =?us-ascii?Q?MrHkYyyCy+UVli0irODobsh2kZVuYbDNd4ZUtszVCk90q2sGnJV0+e0MdNes?= =?us-ascii?Q?AeM8Hquzw0H32V8kQjbu4tGBwLTkVRhYHSA9r1M/p+3ihD0OcmQhfUmNuRe5?= =?us-ascii?Q?kFREVkSEakOkHJuygfnMFjteY8F80F14Da2Q1/vYpG7S1csyNqWKIH5HmGbP?= =?us-ascii?Q?GGjzjucOY4+y6HSvQF94TK5hneM6Bpgz3vq72UVMBKlu+dpOvGPHZmhIn21L?= =?us-ascii?Q?+Z5FWqglBpWhjzR/YINvMV8XTitTFUElF8iVd6B1ITRQu3Qr/QeLFIQ9pxWd?= =?us-ascii?Q?+YCpuDYp2VOHG0WorBulPCVNp0S/H9T+at+zOPyo4MpGelZMHzxWyhqQbKq+?= =?us-ascii?Q?DKGQVBo7QmuiC+dvnJgRTo6p3KkMWxVLtjgCRds+lV2RWbdjLbXdSLU4k1PF?= =?us-ascii?Q?2V/bfNHfNFksRFrs40sHRoq46i0F4TSs0b9Pe2CzCPtWSdejYkry2omDkNhi?= =?us-ascii?Q?42qaClTszI5WZn8nyfDSRKYJ96rv5zYMsx+aYPx5Jj5002/Q8+d4Pu6DnIP5?= =?us-ascii?Q?ZS+ePKn4JU59eSbnjsUnb5GZEAUeotCQf1khT1CMdZChIs5CS98hwsO4ntdm?= =?us-ascii?Q?eUQ6A0+9TcUT7vmFlHtDTS0ad9fc1fE7z9btAT/xkYlXwbkAvW9MBW69EIQf?= =?us-ascii?Q?LTuG3eAPACa5BHAcUYUZ58hnBZmC6STanrXwOyx/GLSFlHzuzEb+ErVR5SL0?= =?us-ascii?Q?2GcDxeREltS1QMweLlLWnebuZFJJCFLNPM6/pbI5iTm9bWsFWxJSXB7THotL?= =?us-ascii?Q?ybvhN1rSfzaxrFIv8rn/dUfzi3v/wT/X86wH4Qu5/aBQAAy1LQa5CBIRPhgH?= =?us-ascii?Q?JJpmBbQ7dZCDpLpcjQIB+ODn8+50vlILJnEQxtEEobUbYbOAJC08S2wUe2l5?= =?us-ascii?Q?wyaf4M+xlIIVW5SlspFU4UM2cNABnnoy5rdCD0YVgDdIbGEZ0v+z+PUjMWLT?= =?us-ascii?Q?CLYq1EPvwLq/1+yy/5eUR7SeqTU7JTH/63hEPwNF45dXm2qvJwcTFolz8Sl3?= =?us-ascii?Q?hmVAtDmii+BuSIFDfGZLd/nG9YdkBgJWROjuhPVDewvTDxDGaHmstPpu0G+j?= =?us-ascii?Q?fSLx+QCkWjNQOjHjDKPaEoAxH5+nXdclGhx4OWkb2UfF4ZsLlO+FL6Y/wqll?= =?us-ascii?Q?G5tiwGHstzQUE8cTlULMtuPiFqIMOGTqMkEkUUkJ064Qeh0m0/xVB69+WuPP?= =?us-ascii?Q?zOxypSdSPrl5UJddJywAfKmFKKRMLZh33Fy5bL8yZ1royd7qWEtatVO1St4/?= =?us-ascii?Q?fg/Tb5iNQT0ipFUQIcgT1w3x3bogNDLKNMDRuWXhyh1uaqgM2ESJ5HzWxtEm?= =?us-ascii?Q?2wjXlN7el30J8NFBcpGHpWYeA/58yQkp8SLK/Nypas49NASv5b4DL22zheXe?= =?us-ascii?Q?H9flpmjqMMhIxJCa3RWJChYr9MVSzYd7Q0UCijAAEe+zsfirQ3ERSnffNlUU?= =?us-ascii?Q?ESQwPxqD3ANK8QZvEOMVFzqdrO7sqejaCC2MyydzRurUIER3?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3403de50-82e9-4671-0d3d-08dec783369d X-MS-Exchange-CrossTenant-AuthSource: SA3PR12MB7901.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jun 2026 06:32:30.4973 (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: a6njLmlnvKOFo8m9chbi8Y5tZUFjlW0HOocsUAbyFlyBVAHgLZI/xGxPsvf+TX+2nqAdp+hkxQDDPTVnZc8OXQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6778 On Tue, Jun 09, 2026 at 05:11:13PM +0900, Yuyang Huang wrote: > /proc/net/igmp6 walks IPv6 multicast memberships under RCU and reads > mca_work.timer.expires to print the remaining multicast timer. The > delayed-work timer can be updated concurrently. > > Annotate the intentional lockless procfs snapshot with READ_ONCE(). > > Signed-off-by: Yuyang Huang Reviewed-by: Ido Schimmel