Re: problem with bhyve, ryzen 5800x, freebsd guest

Interesting enough. It would be nice if you find out what exactly triggered your VM to reset.

—
Vitaliy

> On 1 Aug 2022, at 17:39, Andriy Gapon <avg@FreeBSD.org> wrote:
> 
> On 2022-07-10 20:28, Gleb Smirnoff wrote:
>> On Thu, Jul 07, 2022 at 03:29:04PM +0300, Andriy Gapon wrote:
>> A> I have a strange issue with running an 'appliance' image based on
>> A> FreeBSD 12 in bhyve on a machine with Ryzen 5800x processor.
>> A>
>> A> The problem is that the guest would run for a while and then the host
>> A> would suddenly reset itself. It appears like a triple fault or
>> A> something with similar consequences.
>> A>
>> A> The time may be from a few dozens of minutes to many hours.
>> A>
>> A> Just to be clear, no such thing occurs if I do not run the guest.
>> A> Also, I have an older AMD system (pre-Zen), the problem does not happen
>> A> there.
>> A> A vanilla FreeBSD 12.3 installation that just sits idle also does not
>> A> cause the problem.
>> A>
>> A> Does anyone have an idea what the problem could be?
>> A> What workaround or diagnostics to try?
>> A> Anybody else seen something like this?
>> A>
>> A> Since it's the host that resets it would be hard to capture any traces.
>> I also run bhyve on Ryzen since late 2021 and never had such an issue.
>> But not FreeBSD 12, I run the head.
> 
> 
> Thank you everyone who responded. It seems that the problem was with some BIOS configuration changes, probably related to the power settings.
> Once I reset everything to factory defaults (plus some minimum "safe" and well-understood changes) the problem went away.
> It's really surprising that I saw it only with bhyve and only with the particular kind of VMs. Perhaps there was a workload pattern that triggered a hardware bug or overloaded some specific module.
> 
> Anyways, sorry for the noise and thank you for the help.
> 
> -- 
> Andriy Gapon
> 
> 
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