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Fri, 20 Jun 2025 13:46:55 +0000 Message-ID: Date: Fri, 20 Jun 2025 15:46:49 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [Intel-wired-lan] [PATCH] ethernet: intel: fix building with large NR_CPUS To: Arnd Bergmann CC: Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , "Jakub Kicinski" , Paolo Abeni , Arnd Bergmann , Aleksandr Loktionov , "Simon Horman" , , , References: <20250620111141.3365031-1-arnd@kernel.org> From: Alexander Lobakin Content-Language: en-US In-Reply-To: <20250620111141.3365031-1-arnd@kernel.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ClientProxiedBy: DU7P189CA0006.EURP189.PROD.OUTLOOK.COM (2603:10a6:10:552::6) To DS0PR11MB8718.namprd11.prod.outlook.com (2603:10b6:8:1b9::20) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB8718:EE_|SA0PR11MB4622:EE_ X-MS-Office365-Filtering-Correlation-Id: 4600f7db-c485-4e55-4bd8-08ddb000eb5b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|366016|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?UUc5NHdBaFIxWTV4WVkrZngwWm9mNDNiNllnNUo2M0xWVWJYMEJMZG8wcDRR?= =?utf-8?B?Yi96Tmx2ZDhxZURESFZHK29VNUlPdzVMZjV6Q1dNK0cwVEVKRW9FVklyUHVG?= =?utf-8?B?SjZaa25ZRmVSWmRjREFRcjMyWENnd1cwMUZheWF2dVdOcCsvSFQ5Y0FhaHJ2?= =?utf-8?B?dEw5ZmlKalJZOEQxVVZQVUgwcGVjT1VEdkEvd2ZGZytta1FOY2IxbUN3RFhk?= =?utf-8?B?Z3hEWkptWlIxUFBMSzQrNDJmM0dScmVJWWNKSzBJbjFHUmpUTE9wR1E3Ty9i?= =?utf-8?B?dkJURElYcE9RZUFoUmVYOXVhOEJOVkd3VWw4eExPOTVVelJFWWh5Z1VJblhq?= =?utf-8?B?bUppOHhDQnUybmhob3JiQjNpTFBqWUFXT2liWisxckx1K0NkZFZjMytEaE80?= =?utf-8?B?RTR3b1VPeFc1UzV2ZVJjL0xHV2xXazlEWTZaV0owOGlXYjZ0MFUzcEF6eHVi?= =?utf-8?B?M2NQRi9TT3l3TEtVMzlQZWpyTHBsTG1hSElCUHowcDkvUXFiTlpNT0p5OUxo?= =?utf-8?B?SGx6ZzgxYmRwRkJJSjlZV2wzNEsxRThTeUxMTmQwQy8zVS83b21tSWpqU1JY?= =?utf-8?B?a0o4ekc2a0kzQjFYTUpPbWlmRTBCUjhFYno0UFBvUWJ3WWF2Ti9Wcmt6TWpN?= =?utf-8?B?VkxtSCt1dzhKWmdJazR4eWM1T3BRdG5mcGlDSGxkME5OaURSZFJuK3M0bndI?= =?utf-8?B?NnIzNUlhdWllZ25VUTZoOVF5bmd0dXFYeXFMV05yN3p6RzhjWW9QSXZaUEg1?= =?utf-8?B?UEFrVnA4Um9zeFR0ZzlNcFlFWlJLQlV5K1lvMjV0TGlOWSszQi9DVmFmbzJ0?= =?utf-8?B?RWFsUXR0bGhPUXhwN2VDbTVGblhVNUZ4MUpNaDFpM05WblFFNTkxWGdXMEFG?= =?utf-8?B?OW9tRzI1NngvWDd5SUV2dTNLTTcyY0ZiVHpkVkx3MjJIOEpMY1ZHcTJCWE01?= =?utf-8?B?cGE2ZFYrT1E1VjFyd3gxV1k5SzVJRGg1MVM3SHAzZGJ6bU9qb0N6M1d3VzJN?= =?utf-8?B?ZVlRdVRkOUU2OEkyc0lSWDV4OEdTWjcyZTI4WkV5SUhLUWozQmNoWlU4MFl3?= =?utf-8?B?ZU9ST1k2cHFnNVMxTFdLVW5HQVE3TmIvdTZmUGdQMzVMNlNMYmk5NHRLR3hW?= =?utf-8?B?M0dZc3hJVCtGdEN1bVJ2SFpzTGFGWGphdnFTSm1PYTRKZFYzN1l5WCtCYklV?= =?utf-8?B?ZlJQT0ZGQnA1MjErME5nOVhZMnluNFMySy95NC9LZFJiYTJsOFZXRTZrRFgv?= =?utf-8?B?Y1Y4WitmejBFZjJpMDVBL1JiUCtFVUpyOHlQTjg4L1p1UjdPTUJBVEN6T1ZL?= =?utf-8?B?UjBxQmtrQUtPc0JXTktKRjFkQW1tMXhtbmxvb1V4TkpKTkxMbGhBWVo0K21i?= =?utf-8?B?UGdJR043YUdsNFU0YmEwbk9IOHhMQkR3enlZYTRoQkdXZlZSQ2lpdlE4M1hl?= =?utf-8?B?THRHWlNwTkFFMkZvMzY2SDR4ZzNmU2pVWHlZZnJQRmdKWnhrc2VvcytmQXFl?= =?utf-8?B?cDZWNkViaUhsRmI0QzNsN1FJa0Q2UWdRZEN3SEJMcXh3c3Q5djhoR3hOMlhM?= =?utf-8?B?LzZtL2NURkNNcG1lNy80UnhFNHlpUXF5c1Z6ekUvREQrMVZuKzZmejJYdGM0?= =?utf-8?B?S3RxaTh1MmgxNkdkQ1dpbUMvQ2picnNDRFg5R1BsQ280dExHNGY3bmVpWkJk?= =?utf-8?B?VDVIYnNoTEkreFZUcmhubkpwcDdrSVJlZ2VlRnVnWEI2VHJTRlg0M0hXMDB6?= =?utf-8?B?VnROYmNtdHZXTVdCQVRGYXhoTTVrcllmL0VLYlgyTXlHVEYwTjhkT1dQbjdW?= =?utf-8?B?SENMNlUzMnFpNUlYOHZST1dGOC9VdXZGUDkyNnJHN3VSRytpWEJHSUFWVm5n?= =?utf-8?B?dXVjdVp5Z1lBdkNoN1FOenF2M0tVc3lqUXNRZ2doT1k3WW1vWStEMUQrU1dS?= =?utf-8?Q?1Y8zAN7Bw8w=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS0PR11MB8718.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(366016)(7053199007);DIR:OUT;SFP:1101; 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\ > drivers/net/ethernet/intel/i40e/i40e_main.c:5113:9: note: in expansion of macro ‘kfree_rcu’ > 5113 | kfree_rcu(q_vector, rcu); > | ^~~~~~~~~ > > The problem is that the 'rcu' member in 'q_vector' is too far from the start > of the structure. Move this member before the CPU mask instead, in all three > drivers. > > Signed-off-by: Arnd Bergmann > --- > drivers/net/ethernet/intel/fm10k/fm10k.h | 2 +- > drivers/net/ethernet/intel/i40e/i40e.h | 2 +- > drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 +- > 3 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h > index 6119a4108838..757a6fd81b7b 100644 > --- a/drivers/net/ethernet/intel/fm10k/fm10k.h > +++ b/drivers/net/ethernet/intel/fm10k/fm10k.h > @@ -187,6 +187,7 @@ struct fm10k_q_vector { > u32 __iomem *itr; /* pointer to ITR register for this vector */ > u16 v_idx; /* index of q_vector within interface array */ > struct fm10k_ring_container rx, tx; > + struct rcu_head rcu; /* to avoid race with update stats on free */ > > struct napi_struct napi; I'd place it *after* ::napi as the latter is hot and better to still be near rx/tx etc. Same for the rest of the drivers. Thanks, Olek