[Xen-devel] Re: [Xen-users] Xen 3.4.2 hypervisor crash, Cannot access memory beyond end of bootstrap direct-map area, Unknown interrupt

[gabor <szilagyi@xxxxxxxxxxxx>]

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Keir Fraser wrote:
> No, it'll be a 32-bit-specific issue though. I would recommend just running
> a 64-bit build of Xen, if the CPU supports 64-bit mode. It'll be something
> to do with GRUB2 dumping the dom0 kernel and initrd higher in memory than
> GRUB1, past the end of where 32-bit Xen is set up to be able to access.
> Probably not a hard fix, although I have no GRUB2 installation to test with.
> 
>  -- Keir

Sounds something interesting ... to try...
Could you give some pointers as to how to compile the hypervisor as
64-bit???

I currently have a 32-bit setup but the hardware (CPU/MB/RAMetc) is
64-bit capable and I could just run 32-bit domUs I wanted to run more
than a bare dom0 on the hardware for continutity ....  but I am kind of
free to try ANYTHING .... but I need to run stuff in Debian/32-bit ...

So can you tell me how to compile a 64-bit xen.gz on my current Debian
32-bit PAE setup??? (the host needs to be up for certain other things
although 24/7 is not an issue...)

And if this is helpful to figure this out I am willing to spend some
time to experiment ... to trying to make 32 bit built xen.gz  run with grub2

Let me know...

Gabor





> 
> On 28/01/2010 21:16, "Pasi Kärkkäinen" <pasik@xxxxxx> wrote:
> 
>> CCing to xen-devel and Keir.
>>
>> Keir: Have you seen this Xen hypervisor crash earlier? serial log below..
>>
>> -- Pasi
>>
>> On Thu, Jan 28, 2010 at 03:47:20PM -0500, Gabor Szilagyi wrote:
> Pasi Kärkkäinen wrote:
>>>>> On Thu, Jan 28, 2010 at 03:00:09PM -0500, Gabor Szilagyi wrote:
>>>>> Pasi Kärkkäinen wrote:
>>>>>>>> On Thu, Jan 28, 2010 at 11:11:50AM -0500, Gabor Szilagyi wrote:
>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>>>>>> Hash: SHA1
>>>>>>>>>
>>>>>>>>> Pasi Kärkkäinen wrote:
>>>>>>>>>> On Wed, Jan 27, 2010 at 09:41:02AM -0500, Gabor Szilagyi wrote:
>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>>>>>>>> Hash: SHA1
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Martin Kraus wrote:
>>>>>>>>>>>> On Tue, Jan 26, 2010 at 05:34:59PM -0200, Thiago Camargo Martins
>>>>>>>>>>>> Cordeiro wrote:
>>>>>>>>>>>>> Hi!
>>>>>>>>>>>>>
>>>>>>>>>>>>> 1- Get the ISO of the Debian Lenny 5.0 amd64 from 
>>>>>>>>>>>>> http://debian.org;
>>>>>>>>>>>>> 2- Install your Debian into your own partition scheme (LVM over
>>>>>>>>>>>>> RAID);
>>>>>>>>>>>>> 3- Reboot into your new fresh Debian Lenny; upgrade it;
>>>>>>>>>>>>> 4- * GRUB1 is still the default in Lenny, verify it;
>>>>>>>>>>>>> 5- Install the Xen with the command: "aptitude install
>>>>>>>>>>>>> xen-linux-system-2.6.26-2-xen-amd64";
>>>>>>>>>>>>> 6- Reboot into you new dom0.
>>>>>>>>>>>> Thanks for the effort but how does this solve the problem that xen
>>>>>>>>>>>> doesn't
>>>>>>>>>>>> start? I'm already running virtual hosts on that machine and I 
>>>>>>>>>>>> can't
>>>>>>>>>>>> rip
>>>>>>>>>>>> all of this apart just to get stuck with unbootable system again.
>>>>>>>>>>>>
>>>>>>>>>>>> What I need is to find out what the problem is and then start 
>>>>>>>>>>>> ripping
>>>>>>>>>>>> stuff
>>>>>>>>>>>> apart. I've tried to compile xen myself, versions 3.2, 3.3, 3.4, hg
>>>>>>>>>>>> tip, all
>>>>>>>>>>>> get stuck at some time during xen boot. Until I've tried the live 
>>>>>>>>>>>> cd,
>>>>>>>>>>>> I
>>>>>>>>>>>> thought that it's some incompatibility with my hardware but since 
>>>>>>>>>>>> the
>>>>>>>>>>>> live cd is
>>>>>>>>>>>> debian lenny on iso and it works fine, I have to look for the part
>>>>>>>>>>>> that causes
>>>>>>>>>>>> xen to freeze.
>>>>>>>>>>>>
>>>>>>>>>>>> Since there is only bios, grub and xen running in turn before the
>>>>>>>>>>>> machine
>>>>>>>>>>>> gets stuck I'd say that the problem is in one of these systems.
>>>>>>>>>>>>
>>>>>>>>>>>> I'll try to find out something about grub and then I'm going after
>>>>>>>>>>>> kvm before
>>>>>>>>>>>> I decide to scratch the whole machine.
>>>>>>>>>>> Hi Martin,
>>>>>>>>>>>
>>>>>>>>>>> I am having the same problem ... ever since I installed grub2 I can
>>>>>>>>>>> not
>>>>>>>>>>> get xen to boot. I was told it is possible but yet to see someone
>>>>>>>>>>> writing it down how. Tried the "new" syntax, put dummy=dummy as 
>>>>>>>>>>> first
>>>>>>>>>>> cmd line argument, even compiled the root=/... in the kernel nothing
>>>>>>>>>>> works.
>>>>>>>>>>>
>>>>>>>>>>> I just get Panic on CPU 0 ... and stuck dump.
>>>>>>>>>>>
>>>>>>>>>> Please see:
>>>>>>>>>> http://wiki.xensource.com/xenwiki/XenCommonProblems
>>>>>>>>>>
>>>>>>>>>> section:
>>>>>>>>>> "Booting Xen with GRUB2 fails?"
>>>>>>>>> Thanks for the tip ... I tried all those no change :
>>>>>>>>>
>>>>>>>>> here what I have currently in gurb.cfg both recommendation is use the
>>>>>>>>> file name twice and use dummy=dummy
>>>>>>>> No, you don't use both of them.
>>>>>>>>
>>>>>>>> The problem is that grub2 destroys the *first* parameter,
>>>>>>>> so if you add the filename twice, that already is the extra
>>>>>>>> first parameter, so no need for dummy anymore.
>>>>>>>>
>>>>>>>> Or then don't add the filename, but use dummy.
>>>>>>>> You just need *one* extra parameter there, as the first parameter.
>>>>>>>>
>>>>>>>> See the working example from here:
>>>>>>>> http://old.nabble.com/Strange-interaction-from-grub2-and-XEN-td26464067.h
>>>>>>>> tml
>>>>>>>>
>>>>>>>>
>>>>>>>>> I am trying both the newest patched kernel and the stuck kernel coming
>>>>>>>>> with 3.4.2 source ... both compile without error (I pretty sure I got
>>>>>>>>> the config right for xen). Actually I can boot the 2.6.31.6-xen-2 on
>>>>>>>>> bare metal (strangely not the 2.6.18.8 !!)
>>>>>>>>>
>>>>>>>> xenlinux kernels (2.6.18.8) don't support running as baremetal.
>>>>>>>> pv_ops Xen kernel do support that.
>>>>>>>>
>>>>>>>>> But got the same error ... so I strongly believe that the xen-3.4.2.gz
>>>>>>>>> part crashes already with grub2 ..
>>>>>>>>>
>>>>>>>>> I tried several other combination from grub> prompt pretty much the 
>>>>>>>>> same
>>>>>>>>>  CPU 0 panic and the numbers after (sometime sligthly different dump )
>>>>>>>>>
>>>>>>>> We really need to see the full console output to say what's wrong.
>>>>> Pasi, Sorry for the crossposting I put this in my original thread as
>>>>> well but maybe helpful here..
>>>>>
>>>>>
>>>>>> Ok.. Hmm.. weird crash. Try removing "sync_console console_to_ring" from
>>>>>> the xen options.
>>>>>> Does that make a difference?
> No unfortunately no difference: (note that I did make clean make
> install-xen) just to make sure it compiled right ... but the crash is
> identical...
> 
>  __  __            _____ _  _    ____
>  \ \/ /___ _ __   |___ /| || |  |___ \
>   \  // _ \ '_ \    |_ \| || |_   __) |
>   /  \  __/ | | |  ___) |__   _| / __/
>  /_/\_\___|_| |_| |____(_) |_|(_)_____|
> 
> (XEN) Xen version 3.4.2 (root@xxxxxxxxxxxx) (gcc version 4.3.4 (Debian
> 4.3.4-6) ) Thu Jan 28 15:41:41 EST 2010
> (XEN) Latest ChangeSet: unavailable
> (XEN) Command line: dummy=dummy dom0_mem=512M loglvl=all
> guest_loglvl=all com1=9600,8n1 console=com1
> (XEN) Video information:
> (XEN)  VGA is text mode 80x25, font 8x16
> (XEN)  VBE/DDC methods: V2; EDID transfer time: 1 seconds
> (XEN) Disc information:
> (XEN)  Found 2 MBR signatures
> (XEN)  Found 2 EDD information structures
> (XEN) Xen-e820 RAM map:
> (XEN)  0000000000000000 - 000000000009d000 (usable)
> (XEN)  000000000009d000 - 00000000000a0000 (reserved)
> (XEN)  00000000000ce000 - 00000000000d4000 (reserved)
> (XEN)  00000000000e0000 - 0000000000100000 (reserved)
> (XEN)  0000000000100000 - 00000000d7f80000 (usable)
> (XEN)  00000000d7f80000 - 00000000d7f98000 (ACPI data)
> (XEN)  00000000d7f98000 - 00000000d7fbc000 (ACPI NVS)
> (XEN)  00000000d7fbc000 - 00000000e0000000 (reserved)
> (XEN)  00000000f8000000 - 00000000fc000000 (reserved)
> (XEN)  00000000fec00000 - 00000000fec10000 (reserved)
> (XEN)  00000000fee00000 - 00000000fee01000 (reserved)
> (XEN)  00000000ff000000 - 0000000100000000 (reserved)
> (XEN)  0000000100000000 - 00000001fe000000 (usable)
> (XEN)  00000001fe000000 - 0000000200000000 (reserved)
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) Cannot access memory beyond end of bootstrap direct-map area
> (XEN) ****************************************
> (XEN)
> (XEN) Reboot in five seconds...
> (XEN) Unknown interrupt (cr2=00000000)
> (XEN)   ff202ec4  a1e00000  00000002  ff22be54  00000086  00000001
> ff1d68dc  00000000  ff14e687  0000e008  00000286  ff1d67c0  0000000a
> ff1c5146  ff22b0
> 
> 
>>>>>> -- Pasi
>>>>> Press CTRL-A Z for help on special keys
>>>>>
>>>>>
>>>>>
>>>>>  __  __            _____ _  _    ____
>>>>>
>>>>>  \ \/ /___ _ __   |___ /| || |  |___ \
>>>>>
>>>>>   \  // _ \ '_ \    |_ \| || |_   __) |
>>>>>
>>>>>   /  \  __/ | | |  ___) |__   _| / __/
>>>>>
>>>>>  /_/\_\___|_| |_| |____(_) |_|(_)_____|
>>>>>
>>>>>
>>>>>
>>>>> (XEN) Xen version 3.4.2 (root@xxxxxxxxxxxx) (gcc version 4.3.4 (Debian
>>>>> 4.3.4-6) ) Mon Jan 25 16:28:40 EST 2010
>>>>> (XEN) Latest ChangeSet: unavailable
>>>>>
>>>>> (XEN) Console output is synchronous.
>>>>>
>>>>> (XEN) Command line: dummy=dummy dom0_mem=512M loglvl=all
>>>>> guest_loglvl=all sync_console console_to_ring com1=9600,8n1 console=com1
>>>>> (XEN) Video information:
>>>>>
>>>>> (XEN)  VGA is text mode 80x25, font 8x16
>>>>>
>>>>> (XEN)  VBE/DDC methods: V2; EDID transfer time: 1 seconds
>>>>>
>>>>> (XEN) Disc information:
>>>>>
>>>>> (XEN)  Found 2 MBR signatures
>>>>>
>>>>> (XEN)  Found 2 EDD information structures
>>>>> (XEN) Xen-e820 RAM map:
>>>>> (XEN)  0000000000000000 - 000000000009d000 (usable)
>>>>> (XEN)  000000000009d000 - 00000000000a0000 (reserved)
>>>>> (XEN)  00000000000ce000 - 00000000000d4000 (reserved)
>>>>> (XEN)  00000000000e0000 - 0000000000100000 (reserved)
>>>>> (XEN)  0000000000100000 - 00000000d7f80000 (usable)
>>>>> (XEN)  00000000d7f80000 - 00000000d7f98000 (ACPI data)
>>>>> (XEN)  00000000d7f98000 - 00000000d7fbc000 (ACPI NVS)
>>>>> (XEN)  00000000d7fbc000 - 00000000e0000000 (reserved)
>>>>> (XEN)  00000000f8000000 - 00000000fc000000 (reserved)
>>>>> (XEN)  00000000fec00000 - 00000000fec10000 (reserved)
>>>>> (XEN)  00000000fee00000 - 00000000fee01000 (reserved)
>>>>> (XEN)  00000000ff000000 - 0000000100000000 (reserved)
>>>>> (XEN)  0000000100000000 - 00000001fe000000 (usable)
>>>>> (XEN)  00000001fe000000 - 0000000200000000 (reserved)
>>>>> (XEN)
>>>>> (XEN) ****************************************
>>>>> (XEN) Panic on CPU 0:
>>>>> (XEN) Cannot access memory beyond end of bootstrap direct-map area
>>>>> (XEN) ****************************************
>>>>> (XEN)
>>>>> (XEN) Reboot in five seconds...
>>>>> (XEN) Unknown interrupt (cr2=00000000)
>>>>> (XEN)   ff202ec4  a1e00000  00000002  ff22be54  00000086  00000002
>>>>> ff1d68dc  00000000  ff14e687  0000e008  00000286  ff1d67c0  0000000a
>>>>> ff1c5146  ff22b0
>>>>>
>>>>>
>>>>> Gabor
>>>>>
>>>>>>>> -- Pasi
>>>>>>>>

- --
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