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Fri, 27 Nov 2020 16:09:41 +0000 To: "linux-can@vger.kernel.org" From: Jeroen Hofstee Subject: rx-dropped increases if the can module is not loaded (yet) Message-ID: <269cc265-272e-6b57-0f95-90a3bd66aea3@victronenergy.com> Date: Fri, 27 Nov 2020 17:09:40 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Originating-IP: [2001:1c01:3bc5:4e00:e791:efe6:bf00:7133] X-ClientProxiedBy: AM4PR0902CA0008.eurprd09.prod.outlook.com (2603:10a6:200:9b::18) To DBAPR07MB6967.eurprd07.prod.outlook.com (2603:10a6:10:192::11) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2001:1c01:3bc5:4e00:e791:efe6:bf00:7133] (2001:1c01:3bc5:4e00:e791:efe6:bf00:7133) by AM4PR0902CA0008.eurprd09.prod.outlook.com (2603:10a6:200:9b::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3611.22 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?utf-8?B?U3hqSzBLaDI1WFhsQjRpcWxHWkRtd3BqM3F4RmdURmVLRFhSeWUxMUtnMnBt?= =?utf-8?B?ZWFlQ3Z3cEcyelM2ZFZzN0E2YSsvZGRCdEd4eWhCN2JHSmhmY29KU24zc3hY?= =?utf-8?B?bll1R2MxV2hJUGRGMEZyelhiaUNKNTZkKzljZVU4WDh3Y21aSVFCNy9KdlJV?= =?utf-8?B?NHo1TGszVFNrWUpZc2NjTGFpMU1hdW5qNFhRVVorc1N3eXVNdUU4NEdmczRk?= =?utf-8?B?TWFPTXR1dHJNbXZweXAzMjN4VDhzMlY4ZkJxQjcwV09XZEJWcU1hNHJpdm44?= =?utf-8?B?THU3NVZkU1JSa3R5UFZGSmIyVCtieHBoQk1ZYWZFa1paWUhaREl4cm1nMGhq?= =?utf-8?B?NTZQekQxVkxUbmVpSkJZSGZ2QW1RR2ZaRkxrMERuVE9jRWw5YzJXZkl0Y29K?= =?utf-8?B?N3IzMG84TUtzV3NBMXhMbU5lYWlmNmJGUTJIaXp3OEY4SGpBN0ttWWZrcHhs?= =?utf-8?B?RXZUaGtiRVExbTQ3b3ZXQi9oRlgxdVY5RXpYbG03UFF1eDVYWnRDUENDa0JN?= =?utf-8?B?dUkxZzJDTFhjdVkrSlJHODhKZ0NndVRGTENGUmVuRHJaZktuTTkweVlsV2J0?= =?utf-8?B?QTBOZFRqbkRLSnl5UElmK0IvT1o3MXFvd1daUkJPczY5UXdRdXB3UlFlMkYz?= =?utf-8?B?NU8xNSt2bmdhbWQ3eldEQ2FYSGRzZlNvZGw1S1FMRWVvWUZ0a3owd0NiWVhv?= =?utf-8?B?cU4rYlJRNEg1UEM4ZUwzR1JtV0VUV0xzWmIzWnhYVm9oNnlqSGY2WGhmbGZj?= =?utf-8?B?M0F6aVhLUURGSGZvUzN3RFA3RVVsTFhLZXl5dFBoVC9SakVLK3VNSGJyUFZ3?= =?utf-8?B?bmpzRmdpTTR5ZE9Rc3cyblpwNWlNSm5zekpXZ3lzK3NDWFBqWUVYNW1Xc2FV?= =?utf-8?B?Y3ovM00wOFNyKzd1cW1HYkNFRlViNTNZbUFmZS9hRmpqZ0JkL1pKNEttOUdQ?= =?utf-8?B?UjR2YWJiLzBkT1gzcFVGd2J2Z0hNNTMxOEJ0TVFXMzU0aFhGVXlIRG42VFRM?= =?utf-8?B?QlpjVGpBeHlBWVVJQXhZbXpuUzkydS84VVN3aldkQVJWOTY2ZE5NUGhUcmVx?= =?utf-8?B?Wk45aGFXUmZRbk56LzBHTThVd1V5bFZKcUp1Y1plb3RMSGJvRithdkJKbGFO?= =?utf-8?B?eWJTVlk2ejVPeHlVb0FQYm9mTnNDQTFUUm95Y0UxUnJOcmVjcXFtMXk1dXB2?= =?utf-8?B?Z2JUUmZMNVNEV0JoeXcvSXR4ZFphYVpNYUJ3dFJibWRDZnBZejFzMzJOZFh3?= =?utf-8?B?aTBPRWdEN1ByMjZyN3hFV0hTU05HVFZWeVJ6aTVLTEVOa2xqNUpRN0lLRXdW?= =?utf-8?B?ajNydzVBakhHbE12SVFWYnRYVXgwN3RLQmJwWnFWNFFwT1JZc3EzS0J2aUt2?= =?utf-8?B?Ym1IRGN3SGdZK3NyYVM4WjVIazNybGhNd0lQcFNzU0NwVTkvYkZsazlFUnNq?= =?utf-8?Q?QjS1j8GQ?= X-OriginatorOrg: victronenergy.com X-MS-Exchange-CrossTenant-AuthSource: DBAPR07MB6967.eurprd07.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Nov 2020 16:09:41.6013 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 60b95f08-3558-4e94-b0f8-d690c498e225 X-MS-Exchange-CrossTenant-Network-Message-Id: 551bcdaf-59c0-4f6e-6ff1-08d892eed934 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Oy0AB2isVnhhWWl4+TO4XUzfzYolvnBi2bperwaZasvr9D5cbzsdhMUP8nZYwCOsduumDH4sCDZGyyOfeK4+HuHYywHIRIhTQkTShVKnRpg= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR07MB7098 Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org Hi, Since it took me a while to figure it out, it might be worthwhile to share. If a CAN-bus network interface is first set to up and only later used, the messages received in the meantime are counted by [1] as dropped. If the the can module is modprobed before the interface is upped, this is no longer the case. Perhaps it saves someone some time. Jeroen [1] https://github.com/torvalds/linux/blob/v5.9/net/core/dev.c#L5257