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Message-ID: Date: Fri, 17 Oct 2025 18:09:54 +0100 User-Agent: Mozilla Thunderbird Content-Language: en-GB To: xen-devel From: Andrew Cooper Cc: Jan Beulich , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= , Denis Mukhin Subject: lost serial characters on boot Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: LO4P265CA0096.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:2bc::14) To DM4PR03MB7015.namprd03.prod.outlook.com (2603:10b6:8:42::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR03MB7015:EE_|MW4PR03MB6330:EE_ X-MS-Office365-Filtering-Correlation-Id: d34c8ff8-7b6e-457f-3fd4-08de0d9fffb1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|366016|1800799024; X-Microsoft-Antispam-Message-Info: =?utf-8?B?OFBmREk5RVBlb2lkQWNSbnQ0Rkpjc1NDVkJUMXRGRlZJRmU1UE5DcSsrV1Uv?= =?utf-8?B?eTk4Yk5qZ0hiS0c0OXh6UzZ4TUVaZ0VOTngwaFBDYmVxcFltbElscmFNWU5V?= =?utf-8?B?UXN2VmcvUE0xeWVDcWVQZmVBbjNZSWwwbHYyMnpCeXRxWUhuRmdJNkI5WTZJ?= =?utf-8?B?ZDBzNjJOd0NwVlN1eC83K0p3K250Z1duMzh6ODFjV1NtZTNKc2JxTUhjeEg4?= =?utf-8?B?T3JCU0t6em12UkQ4SjM0QmhMTHJ0ZEJ4QUx5NEJGVGIyU0FRcFUzVkk1d2tU?= =?utf-8?B?Z0ZVOEpZa3RwNU1URzRtbC8raWxsRElkTzBUckxEMWRrRnFMZzBxdTVkWXpq?= =?utf-8?B?Q1l3c2Fiak5lWmpublFKUUMzaFhwamxCSGx0OElTM2xDc3c1KzJZSEl2ZWtX?= =?utf-8?B?OHBIY3BMbkp1YjVvU1d3cTNjVGY2R2QzMHpuNStmMzlnVCtzUkI3dWtlOS9s?= =?utf-8?B?U2cwL2FaRGl4dHZ6RlBkcHpVakdhYUZwV2k3L0tpcE8zUnhFRjMveXBvZk1I?= =?utf-8?B?YmpyNUtZaW51eDZlVFR6WWhWRFRyRnQ4TytITWszczdtZlltZlFVVisvelZy?= =?utf-8?B?d1VOWHQyOS8vRnJlbXhBMHlGZngrNStDSmtlRkVKbzYrK3E5ZlREOFFQMUhM?= =?utf-8?B?cDRwQzlDdTk4RUdJM3Z4ZERQSUo1MGppbkk2YlNmSmJ2c0V4eWR4OUYzUnFR?= =?utf-8?B?VGQrcmZuaS9IZzR0bzlCcXVPMGtYaWRlRUJaVFZZaVh3VHpxalI5a05YclVo?= =?utf-8?B?OTViMmlGejNQTnNOVVd5bkNKNmJFMkpPcmtFR3BabFBUK3ZRd28zZUxtWHB4?= =?utf-8?B?TDMvRDhGTjdXeU5YM1k3Z1BoUnF1RnY0R3Y3VXl2NlB5M1M5UjAzSWt0SkEx?= =?utf-8?B?R1FYTnI5eEw5V09nQkM0ald6dDNjamVTSzlaa2UybVNPOHFzaHhaNXBmaTZ5?= =?utf-8?B?V2g0aXVuYnFzWm1iQUUwNnlxR3ltS2VYVDU1L1FQNTZsWnVBQTlGeUZKMm40?= =?utf-8?B?QzAyUHY2bC8rdlg4RzBWMm5uckhoenFYd3ZxNHpPUGVPR2IrdXlpb3JzS05t?= =?utf-8?B?bGxhVkJsclVPTC82K1VUeXJBZFJnM3Npd3RoRVk2NzZSU2xxeGExbThseW1o?= =?utf-8?B?ZTVsaVFCSS9pNVNTODVuSHZoL3VGNG51QmlnZnZ1N3Jhd1lITDBlTzBzQmdG?= =?utf-8?B?MU9ld1FGZ2R0WU54S2JFMlJUaTVTTzVnQmo3azVUSEpzZERsZ2xtTm1ycWxJ?= =?utf-8?B?bDI2bnBHSjFBSXJoYmNleEpRWU44MnpRcDJLWTI5b2FUSENBTk9PZDVndU5S?= =?utf-8?B?SlNQNVVjWW02eVFaZUNuY3JUcXB6cEZsSlZpendkcG5jaXg2L2JSYkNsR1hl?= =?utf-8?B?b3Z5WGU5eHhFT2xKSVlqUTREbUJtZXJKa2tGUmloa09IUjlCRkhQTFRxcEh6?= =?utf-8?B?UUt3Y1ZudUx5ZVhEd2dvNkpjQUNlUkpFVWZYWjNncWIyb2E2cU1oNUU0c0l0?= =?utf-8?B?L0hmMkNzOG5nbStqeXRnNTdKSERDWktjWUhybVZTMWtobzJBWUt1SVhsVnRV?= =?utf-8?B?ZE83cEFqS0RpY3hHZmxEczZNNFQyN3dqaDZUVStBaEVLN0Z0ZTRsNGxMQldp?= =?utf-8?B?SGRKdUx5Y1FjL2tpYUF0MGplZFBKcGVxUnJQL0NHM1FUTktOTEpiTEVRQnIv?= =?utf-8?B?WGdIN1J3RUwyTkZab2VHTHczdDZtSDZuZ2ZNTmtiS0x0SjI4Z0dSNURZelAx?= =?utf-8?B?ZFUwTXhjcDFkVDhNTy9sSXYwMlVjYmVOVEtUb3Z3NlZGakxmaVBQUllTNnI2?= =?utf-8?B?YVNDR2czdkYvT3ZRaVJjUUo1TWRucDArUFNQOUZiRkZKUjhteXYrVkFMTG9x?= =?utf-8?B?bTE2QSt6bjRweDdMTU1wOXZBNExmQ2NjdjgyTUVZZkN3elBtRjRlcm9pZDYy?= =?utf-8?Q?LwcZZXf0UvKuAdFob7oR3sdEkmr+6BCq?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM4PR03MB7015.namprd03.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(366016)(1800799024);DIR:OUT;SFP:1101; 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I've been seeing this for a little while, but one of my common dev machines is showing it fairly reliably at the moment. Checking a transcript of the terminal, we're missing characters, rather than having additional control characters causing the corruption. I suppose I need to stare at console_init_preirq() some more, but if anyone has ideas, I'm all ears. ~Andrew