Neat. Random guess, but it could be a bug in Bulldozer's memory controller
or IOMMU. Try disabling IOMMU support in your kernel?
On Apr 29, 2012 3:29 PM, "Markos Chandras" <hwoarang@gentoo.org> wrote:

> On 04/28/2012 01:24 AM, Matthew Marlowe wrote:
> > On Fri, Apr 27, 2012 at 3:54 PM, Markos Chandras <hwoarang@gentoo.org>
> wrote:
> >> On 04/27/2012 11:45 PM, Nikos Chantziaras wrote:
> >>> On 27/04/12 22:35, Markos Chandras wrote:
> >>>> I replaced my Phenom II cpu with a new 6-core AMD bulldozer. However,
> I
> >>>> noticed that all of my Gentoo virtual machines throw (compiler)
> >>>> segmentation faults when building or running any application.
> >>>
> >
> > I'm not familiar with virtualbox, but I've seen similar issues occur
> > with vmware and the solution was to at least temporarily mask whatever
> > new cpu flags the new hypervisor was passing to the guest.  In vmware,
> > one could limit the cpu flags to maintain compatibility with various
> > cpu releases which was especially helpful in clusters.... Yes, your
> > gentoo vms should have been fine ..but at least until you track down
> > the issue, see if virtualbox has a similar feature?
> >
> Interestingly this seems to be caused when using my wireless card to
> bridge the virtualbox interfaces onto. I can't reproduce (yet) any
> segfaults when I use the onboard ethernet card. I have the following
> wireless card (supported by the rtl8180 kernel module)
>
> 04:06.0 Ethernet controller: Belkin F5D7000 v7000 Wireless G Desktop
> Card [Realtek RTL8185] (rev 20)
>
> --
> Regards,
> Markos Chandras / Gentoo Linux Developer / Key ID: B4AFF2C2
>
>