Re: Xen 4 and NetBSD

[haad <haaaad%gmail.com@localhost>]

Hi,

On Wed, Sep 22, 2010 at 3:45 PM, Dirk H. Schulz
<dirk.schulz%kinzesberg.de@localhost> wrote:
> ÂAm 07.07.10 11:22, schrieb Christoph Egger:
>>
>> On Wednesday 07 July 2010 09:59:53 Dirk H. Schulz wrote:
>>>
>>> Hi folks,
>>>
>>> I tried to find out if there is a Xen4 implementation for NetBSD (at
>>> least a domU kernel), but did not find any real hints.
>>>
>>> Can someone please direct me to relevant information or just tell me if
>>> work is in progress, finished, whatever?
>>>
>>> Or is it possible to run a NetBSD Xen 3.2/3.3 domU on a Xen4 dom0? Has
>>> anyone out there tried that? Any success or experience to share?
>>
>> Xen 4 is backward-compatible to Xen 3.x. That means all NetBSD Xen 3
>> DomU/Dom0 run on Xen 4.
>>
>> Christoph
>
> I am afraid it is not that easy. Starting my xen3 NetBSD domU leads to:
>
>> total memory = 256 MB
>> avail memory = 245 MB
>> mainbus0 (root)
>> hypervisor0 at mainbus0: Xen version 4.0
>> vcpu0 at hypervisor0: Intel 686-class, 3200MHz, id 0xf41
>> xenbus0 at hypervisor0: Xen Virtual Bus Interface
>> xencons0 at hypervisor0: Xen Virtual Console Driver
>> xencons0: using event channel 2
>> npx0 at hypervisor0: using exception 16
>> xbd0 at xenbus0 id 1: Xen Virtual Block Device Interface
>> xpq_flush_queue: 1 entries
>> 0x00000002d2c992e8: 0x000000000ce67003
>> panic: HYPERVISOR_mmu_update failed
>>
>> fatal breakpoint trap in supervisor mode
>> trap type 1 code 0 eip c039682c cs 9 eflags 246 cr2 0 ilevel 6
>> Stopped in pid 0.12 (system) at netbsd:breakpoint+0x4: Âpopl  Â%ebp
>
> I have googled, but found only older entries saying that the dom0 kernel
> must be compiled with unset debugging options. I have done so, but that did
> not help.
>
> Do NetBSD Xen3 domUs really run on Xen4 (I am using the Debian Testing
> hypervisor and dom0)? I found several posts stating that networking is
> broken but no current one describing the above problem.
>

Can you boot netbsd there again and run bt in ddb  so we can see where
it panics ?


-- 


Regards.

Adam