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mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.onmicrosoft.com; s=selector2-citrix-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=/kWF9SLEDid5HopZY6yt3vHr0m7iPltaTyLP03kOgUE=; b=nbWn3CPYLHQxbKwsNxBzR/t83wmCxpcazWWXVz1Xcv/9Y4LzGLInxOONsHh1h5WFE8L1/6Ff5Ls8hIiHgQakM0ffcLM68Xw9xy3L29d2yvshntMmbb0uA9Ba3bb6sMcyHkAr9EC7zm2nkHcSIJ+NukF1vWlWeTzfv7YgczICPoo= Date: Fri, 23 Apr 2021 17:08:45 +0200 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Sergey Kovalev CC: , Subject: Re: Fwd: [BUG] Windows is frozen after restore from snapshot Message-ID: References: <6237e102-f2cf-a66e-09b6-954ebfe28f8c@list.ru> <46f8bf3e-cd6e-e2de-94c1-c8a55fb10648@list.ru> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <46f8bf3e-cd6e-e2de-94c1-c8a55fb10648@list.ru> X-ClientProxiedBy: MR2P264CA0075.FRAP264.PROD.OUTLOOK.COM (2603:10a6:500:32::15) To DS7PR03MB5608.namprd03.prod.outlook.com (2603:10b6:5:2c9::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 66d948cb-0437-420b-8a3e-08d90669b3ff X-MS-TrafficTypeDiagnostic: DM6PR03MB3834: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:9508; 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X-MS-Exchange-AntiSpam-MessageData: =?utf-8?B?MTJzUTNFZDZQdm5hZGpUbExCc2R0STR3RXdUTmRoOW1LM3hUdk5DYWF6UHlp?= =?utf-8?B?SDRNZG1YanFiZTBLUmFvbTZBV21XQ3Mxc2dpdGNUVjlubWpjSDNNcFY1OER6?= =?utf-8?B?N05xRUtaU0dqNmg5cTFnUE1TdnErTXpwZlVrV3psdHRGeFAwZCtKQVlQWGpD?= =?utf-8?B?VXdFYXFXa0grTGVYRktIZFk3S1lHNEZaZ0hLNm9qV05wNjBYT2toeHJXUk11?= =?utf-8?B?RnJ2YllyZ2pCU1lKOVJnM29jdGlQZDNGL2Nna3NNbFZUU3lFWTR6WkFaeU1t?= =?utf-8?B?NWhJd3R3VldQN29BWGYyOUc2UG5jYWhQcHEvdkdTK1ZrWld1eWNJOEFwNVpl?= =?utf-8?B?dHliUUpzM0lYb1pWQk9icmRaM1ErazZlc1NKT3pSQUFTNEhuemN2dGkwYnFl?= =?utf-8?B?TGtvbUdON0RKK1NXa3h6TjMxZUlFYjB0TjE5dEc2L294Umx1KzJybVdRTEZJ?= =?utf-8?B?cVdlc0NzUlB0dlo4WlV0V3E3dUVsdE8vWUtoMkJhamIrZkFSbmU5NDM4SnN4?= =?utf-8?B?QkVIekdYc1RzWmdmVnRRejNKQmZHV012c2o3U2dZZHhxNWkrazJIOW1qd0FY?= =?utf-8?B?RVJPRHVxSlVHdnprbWhJMGdscytvRGVxTkZyRnlOS3R4QVVvcVVoeENicU9F?= =?utf-8?B?UStxSHlHT1Z2V0srYWlmcUlncUUrUHdaUDJMMTQ1VndwUGtDQXlpeU8vVDls?= =?utf-8?B?cGtrQVZDT0lZSHM5LzN0ZzhDWGJIRmo5dzNkcE5JaDJEWlNmUDhmcTZZUGJM?= =?utf-8?B?eEt0Z1hUeDQyd3EvMDk2dGFjQkFLWmJJZmlqbDkwSmF3QWpwZjhia2Z3cU9q?= =?utf-8?B?U0h6cnliR2NWbkMzTlNCZkNmOXNpckQ4Q1dObUpsenRrTFNHVU9SdWdibmhQ?= =?utf-8?B?MWFLZ3d3WmFOVEZzaFlQQlBramJDYzRweW1pUGtxQzRtaHFRQm1aWlF3bFBN?= =?utf-8?B?dDZkN1YwSC9sNG5PVUtFMll6UVpKS0plWnlwVDdIVG1vcE9qZUVUdEJiaWYr?= =?utf-8?B?a3lJV1F0Qk5LTFBWUjRNM3dyUzdzTDhQOEJRTnR3MEZiZml4MG5ycTVsKytm?= =?utf-8?B?bU1Qb2liMnRLMXhQN0xyYVJ6OEF1cEN0Rlk2c0NocHNwcDRoM01zajEzaUUw?= =?utf-8?B?OVFwOHNpa2ZGL0FjbG43YSs3YU5Ld0phRTdtZWdHcUp5TVlEU29EZk5kR0NS?= =?utf-8?B?Rk5HQmxXREYrTG85QTVBejZFb2FyUFVXWldDUGw0N2l2aWxNME1LMDZjWTN1?= =?utf-8?B?TEpZbHZNa3JSKzlUdU9ERitoSnBEd2RCSEtQR3JNR0xzLzhhbkRFQlc4NDFm?= =?utf-8?B?b05tODVwUDZGWlUrY3ZBT25YU05mZHJ0dGhlUTNDQlJkOW5ucUlSWEdzbHVM?= =?utf-8?B?YU00V2dkWTBQcm1MWFhZbkpxQmduNUVNMjVERmU3TFFHeGZjbERnY3M0NHQ1?= =?utf-8?B?bFo2clF4Mno0YThvM05EUlNiVTFWZ0JDV0VvN1VQY2dJQXFrdWc1SjFRL2ZQ?= =?utf-8?B?eHQzRW9qRkxHajZKT1cyd3RTWGE2M0tlbWNJMUJ6U0pCK1o3cXZLa3psZ2J3?= =?utf-8?B?TlVqbDAxeCt3ZmJjRXhuSEx0UUo5UHZHOVlJR05wbUlSNTRzWUFidVNwZUZD?= =?utf-8?B?VERqMUNGdG0zdVVvckJvYk9CbktaSmZhUmZBUnBEWVRhaTZPVzdKZ2tuc2ZV?= =?utf-8?B?cjZ5b25jaC9Da2V5VkxoY0dKMVJ5anBibmxBQWt1ZkQvVEsyWitucm1qZEdN?= =?utf-8?Q?0WrAAqo0NpJrSx2ekdTVe6Qc9CNr+rzbvHklcyO?= X-MS-Exchange-CrossTenant-Network-Message-Id: 66d948cb-0437-420b-8a3e-08d90669b3ff X-MS-Exchange-CrossTenant-AuthSource: DS7PR03MB5608.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Apr 2021 15:08:51.3027 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 335836de-42ef-43a2-b145-348c2ee9ca5b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: M74u/1huIhwlcvYWcyqNQ7QA0/0Z8bn8VIVle6zXZzVNkfbHP9WNshp5ijStd+g99LcAAfO+FQcS+sZ1SQEBpg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR03MB3834 X-OriginatorOrg: citrix.com On Fri, Apr 23, 2021 at 01:22:34PM +0300, Sergey Kovalev wrote: > # Abstract > > After `xl save win win.mem` and then `xl restore win.hvm win.mem` > the Windows 10 VM remain frozen for about a minute. After the > minute it becomes responsive. > > During the freeze the OS remains semi-responsive: on `Ctrl+Shift+Esc` > press the wait cursor appears (blue circle indicator). > > This is an intermittent fault been reproduced only twice. > > # Technical notes > > It have been noticed that there were no timer interrupts during > the freeze. > > zaytsevgu@gmail.com has debugged the received Xen state file and > noticed that the flag HPET_TN_PERIODIC been set after unfreeze. > > Based on that he provided two Python scripts: one to check the > value and one to patch it. > > Both "broken" state files we have been detected and patched > successfully. > > # Other information > > ## Target machine > > ```bash > $ uname -a > Linux localhost 5.4.0-66-generic #74~18.04.2-Ubuntu SMP > Fri Feb 5 11:17:31 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux > ``` > > ## Xen version > > Build from source on tag RELEASE-4.12.4 > > ## OS version > > * Windows 10 build 1803 x64 Do you also run other versions of Windows, and in which case I assume you have never seen the issue on those, or it's this specific version the only that you use? Thanks, Roger.