On Mon, Nov 27, 2023 at 01:35:24PM -0800, [email protected] wrote:

> From: Peter Martincic <[email protected]>
>
> Hyper-V hosts can omit the _SYNC flag to due a bug on resume from modern
> suspend. In such a case, the guest may fail to update its time-of-day to
> account for the period when it was suspended, and could proceed with a
> significantly wrong time-of-day. In such a case when the guest is 
> significantly
> behind, fix it by treating a _SAMPLE the same as if _SYNC was received so that
> the guest time-of-day is updated.
>
> This is hidden behind param hv_utils.timesync_implicit.
>
> Signed-off-by: Peter Martincic <[email protected]>

Hi!

As Peters mail does not seem to exists any more, I'll ask here (LKML and LHV), 
if all right:

Is there any news  about this bug on Hyper-V hosts?
If this is actually a Hyper-V (host) bug, was it ever addressed and fixed?

I encounter this bug when using Windows 11 Enterprise (25H2) host and Oracle 
Linux 8 and 9 as guests.
They use an older kernel, so I can't use this parameter to fix it.

Windows guests do not seem to be affected by it, in my experience.

Feel free to reply off list, as it is not really on topic.

Regards,
David Balažic



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