[pve-devel] maybe a windows reboot hang fix

[Wolfgang Bumiller]

On Mon, Aug 15, 2022 at 07:00:51AM +0000, DERUMIER, Alexandre wrote:
> Hi,
> I'm still trying to fix windows reboot hang after windows update (I also 
> have the problem in production).
> 
> 
> I have found a related bug in redhat bugzilla
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1975840#c151
> 
> 
> https://access.redhat.com/solutions/6836351
> Issue Microsoft Windows guests hang while rebooting, the bootscreen 
> shows the Windows log and the boot circle endlessly.
> 
> Resolution There is no resolution or workaround at this time, please 
> power off the Guest and power on again.
> 
> Root Cause This is Bug 1975840 - Windows guest hangs after updating and 
> restarting from the guest OS
> 
> and is caused by a TSC (Time Stamp Counter) issue in Guest when it 
> overflows during boot time i
> f the value provided by the virtualization platform is already high. It 
> tends to affect Guests with longer uptimes.
> 
> 
> A patch has been in qemu master
> https://github.com/qemu/qemu/commit/5286c3662294119dc2dd1e9296757337211451f6

Seems like qemu 7.0 already contains this, I just forwarded a 7.0
package to the pvetest repo if you'd like to play around with it :-)