Re: Fwd: [BUG] Windows is frozen after restore from snapshot

[Jan Beulich <jbeulich@xxxxxxxx>]

On 23.04.2021 15:10, Георгий Зайцев wrote:
>>
>> Since
>> you've taken apart saved state, could you supply the full set of
>> values (ideally multiple ones, if you happen to have them, plus
>> ones where the problem didn't occur, to allow someone perhaps
>> spot a pattern)?
>>
> 
> Here is full HPET state from "frozen" snapshot according to hvm_hw_hpet
> structure:
> 
> capabiliy: f424008086a201
> res0: 0
> config: 3
> res1: 0
> isr: 0
> res2: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0]
> mc64: 97b90bc74
> res3: 0
> timer0:
>         config: f0000000002934
>         cmp: fd4aa84c
>         fsb: 0
>         res4: 0
> timer1:
>         config: f0000000000130
>         cmp: ffffffff
>         fsb: 0
>         res4: 0
> timer2:
>         config: f0000000000130
>         cmp: ffffffff
>         fsb: 0
>         res4: 0
> period[0] = ee6b2
> period[1] = 0
> period[2] = 0
> 
> This one taken from snapshot of "unfrozen" one:
> 
> capabiliy: f424008086a201
> res0: 0
> config: 3
> res1: 0
> isr: 0
> res2: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0]
> mc64: acbd23c57
> res3: 0
> timer0:
>         config: f000000000293c
>         cmp: acbd3761b
>         fsb: 0
>         res4: 0
> timer1:
>         config: f0000000000130
>         cmp: ffffffff
>         fsb: 0
>         res4: 0
> timer2:
>         config: f0000000000130
>         cmp: ffffffff
>         fsb: 0
>         res4: 0
> period[0] = ee6b2
> period[1] = 0
> period[2] = 0
> 
> The only difference is HPET_TN_PERIODIC flag for timers[0].config value

Thanks, but now I'll need to understand what your quoted "frozen" and
"unfrozen" mean. Plus obviously comparators and main counter are also
different, and it's there where I suspect the issue is.

Jan