[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: Fwd: [BUG] Windows is frozen after restore from snapshot
23.04.2021 18:08, Roger Pau Monné пишет: 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@xxxxxxxxx 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 x64Do 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. We use Windows 7 SP1 x86/x64, Windows 8.1 update1 and Windows 10 1803 x64. The Windows 10 is the only one affected by the bug at the time. -- With best regards, Sergey Kovalev
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