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.
[email protected] 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.
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
