VirtualBox mangles memory

[Bernhard Fröhlich]

To me this sounds a lot like vbox and zfs arc are fighting for resources.
What does the memory line in top look like when this problem happens?

A simple workaround would be to limit zfs arc in loader.conf if that is the
problem.

Am 22.09.2015 5:13 nachm. schrieb "Martin Birgmeier" <la5lbtyi at aon.at>:
>
> This did not happen when the machine was running FreeBSD 9.2 with
virtualbox-ose-4.3.20 installed. So I would not qualify this as "known
behavior".
>
> One server has 16G main memory, a VM gets 3G. The other has 8G main mem
and again 3G allocated to the VM.
>
> This is definitely a bug in how VirtualBox handles memory on FreeBSD 10.
I am pretty sure that something changed in FBSD 10 which was not properly
taken care of in VB.
>
> -- Martin
>
>
>
> On 09/21/15 22:10, Mark Felder wrote:
> >
> > On Sun, Sep 20, 2015, at 06:20, Martin Birgmeier wrote:
> >> On machines where VirtualBox is running, I get memory allocation
errors.
> >>
> >> 'dd' aborts with 'dd: stdout: Cannot allocate memory'
> >>
> >> 'zfs send' aborts with 'internal error: Cannot allocate memory'
> >>
> >> I have created https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195970
> >> to track this.
> >>
> >> Could a knowledgeable person please have a look into this?
> >>
> >> FreeBSD 10.2, VirtualBox 4.3.30
> >>
> >> -- Martin
> >>
> > I'm not an expert, but I think this is known behavior. Virtualbox
> > requires a huge contiguous chunk of memory for the VM and that's
> > probably what you're running into.
> >
> > Can you give more information about the specs of the server itself and
> > the amount of resources allocated to VMs?
> >
>
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