Gentoo Archives: gentoo-user

From: Michael Mol <mikemol@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: Gentoo segfaults on virtualbox-4.1.14 when running on AMD bulldozer
Date: Mon, 30 Apr 2012 19:25:00
Message-Id: CA+czFiA7RsM9ai2z_4Qr3NTU4LLPdW1e1ZmO3aTjQzoG71aGiQ@mail.gmail.com
In Reply to: Re: [gentoo-user] Re: Gentoo segfaults on virtualbox-4.1.14 when running on AMD bulldozer by Markos Chandras
1 On Mon, Apr 30, 2012 at 3:03 PM, Markos Chandras <hwoarang@g.o> wrote:
2 > On 04/30/2012 02:33 PM, Michael Mol wrote:
3 >> Neat. Random guess, but it could be a bug in Bulldozer's memory
4 >> controller or IOMMU. Try disabling IOMMU support in your kernel?
5 >>
6 >> On Apr 29, 2012 3:29 PM, "Markos Chandras" <hwoarang@g.o
7 >> <mailto:hwoarang@g.o>> wrote:
8 >>
9 >> On 04/28/2012 01:24 AM, Matthew Marlowe wrote:
10 >>> On Fri, Apr 27, 2012 at 3:54 PM, Markos Chandras
11 >> <hwoarang@g.o <mailto:hwoarang@g.o>> wrote:
12 >>>> On 04/27/2012 11:45 PM, Nikos Chantziaras wrote:
13 >>>>> On 27/04/12 22:35, Markos Chandras wrote:
14 >>>>>> I replaced my Phenom II cpu with a new 6-core AMD
15 >>>>>> bulldozer.
16 >> However, I
17 >>>>>> noticed that all of my Gentoo virtual machines throw
18 >>>>>> (compiler) segmentation faults when building or running any
19 >>>>>> application.
20 >>>>>
21 >>>
22 >>> I'm not familiar with virtualbox, but I've seen similar issues
23 >>> occur with vmware and the solution was to at least temporarily
24 >>> mask whatever new cpu flags the new hypervisor was passing to the
25 >>> guest.  In vmware, one could limit the cpu flags to maintain
26 >>> compatibility with various cpu releases which was especially
27 >>> helpful in clusters.... Yes, your gentoo vms should have been
28 >>> fine ..but at least until you track down the issue, see if
29 >>> virtualbox has a similar feature?
30 >>>
31 >> Interestingly this seems to be caused when using my wireless card
32 >> to bridge the virtualbox interfaces onto. I can't reproduce (yet)
33 >> any segfaults when I use the onboard ethernet card. I have the
34 >> following wireless card (supported by the rtl8180 kernel module)
35 >>
36 >> 04:06.0 Ethernet controller: Belkin F5D7000 v7000 Wireless G
37 >> Desktop Card [Realtek RTL8185] (rev 20)
38 >>
39 >> -- Regards, Markos Chandras / Gentoo Linux Developer / Key ID:
40 >> B4AFF2C2
41 >>
42 > AMD IOMMU (Device Drivers -> Hardware IOMMU ) makes no difference. I
43 > will have to move the discussion to virtualbox forums/ML as this seems
44 > a driver or virtualbox problem. Bridge networking on that wireless
45 > card work flawlessly when using Windows 7 as host.
46
47 Report back when you find out the meat of the problem. I'm intensely curious.
48
49 --
50 :wq