Re: [gentoo-user] Kernel parameters for VirtualBox

[Peter Humphrey]

On Thursday 18 February 2016 11:51:19 J. Roeleveld wrote:
> On Thursday, February 18, 2016 10:06:25 AM Peter Humphrey wrote:
--->8
> > I still can't shake the idea that I don't have my kernel set up right. Do
> > I
> > need anything particular in control groups, or name spaces, or anything?
>
> About the kernel: I don't have anything special.
>
> USE-flags:
>
> [I] app-emulation/virtualbox
>
>      Installed versions:  4.3.32{tbz2}(03:46:09 PM 11/25/2015)(additions
> alsa extensions java opengl pam pulseaudio qt4 sdk udev -doc -headless
> -libressl - python -vboxwebsrv -vnc ELIBC="-FreeBSD"
> PYTHON_TARGETS="python2_7")

My USE flags:

     Installed versions:  4.3.32{tbz2}(10:25:28 18/02/16)(additions alsa 
extensions opengl pam qt4 sdk udev -doc -headless -java -libressl -pulseaudio 
-python -vboxwebsrv -vnc ELIBC="-FreeBSD" PYTHON_TARGETS="python2_7")

I don't have pulseaudio here, but do I need java for virtualbox?

> What does " dmesg " have to say?
>
> For me:
> % dmesg | grep -i vbox
> [  165.950507] vboxdrv: Found 8 processor cores.
> [  165.950787] vboxdrv: fAsync=0 offMin=0x1fe offMax=0xa4f9
> [  165.950828] vboxdrv: TSC mode is 'synchronous', kernel timer mode is
> 'normal'.
> [  165.950829] vboxdrv: Successfully loaded version 4.3.32 (interface
> 0x001a000b).
> [  165.978641] vboxpci: pci-stub module not available, cannot detach PCI
> devices
> [  165.978643] vboxpci: IOMMU found

$ dmesg | grep -i vbox
[    4.163645] vboxdrv: Found 4 processor cores.
[    4.163748] vboxdrv: fAsync=0 offMin=0x1d8 offMax=0xd44
[    4.163792] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 
'normal'.
[    4.163793] vboxdrv: Successfully loaded version 4.3.32 (interface 
0x001a000b).
[    4.173458] vboxpci: pci-stub module not available, cannot detach PCI 
devices
[    4.173461] vboxpci: IOMMU not found (not registered)

That last one is suspicious, presumably connected with this:

$ dmesg | grep IOMMU
[    0.119875] dmar: IOMMU: failed to map dmar0
[    4.173461] vboxpci: IOMMU not found (not registered)

I wonder what dmar0 is.

> How exactly are you starting the VMs?
>
> I do it all with the GUI: /usr/bin/VirtualBox

Me too, with no problems, but one BOINC project I use includes a .vdi which it 
submits to virtualbox as a guest. That's what's failing. I want to make sure 
virtualbox is set up right before going after that.

-- 
Rgds
Peter