root not properly dismounted as Virtualbox guest

[bugzeo]

Running FreeBSD as Virtualbox guest. I always run poweroff as root or hit the shutdown icon on XFCE4. Most of the times, after powering on again, it reboots 2 or 3 times and displays:

WARNING: / was not properly dismounted
[...]
Starting file system checks:

Eventually everything works fine, but wonder what may be happening.

 

[Cath O'Deray]

… powering on again, it reboots …

You can probably avoid these kernel panics by limiting the guest to a single CPU.

FreeBSD bug 254412 – emulators/virtualbox-ose-additions - Boot time crash - Sleeping thread owns a non-sleepable lock

 

[bugzeo]

That may be the issue. Let's try.

 

[Cath O'Deray]

bugzeo please, what's the outcome of having a single CPU?

Any kernel panic?

---

Panics aside, what's the output from this command?

tunefs -p /

 

[bugzeo]

It's not happening any more. Will check again if problem pops up again.

 

[Cath O'Deray]

It's not happening any more.

Thanks, is that with the guest set to use two or more CPUs?

 

[bugzeo]

Thanks, is that with the guest set to use two or more CPUs?

It has 4 virtual CPUs.

 

[Cath O'Deray]

Thanks.

Here, symptoms are sporadic. I do often run the risk of multiple CPUs, and sometimes get panics with that risk. Yesterday I had a series of one panic after another, after another, after another … and so on.

Never a panic with the guest limited to a single virtual CPU.

 

[bugzeo]

It's not that important anyway, it's just when powering off, it boot again no problem.