Re: Re: Panic on cpu0

[Keir Fraser <keir@xen.org>]

Could you build a 64-bit hypervisor instead? In all honesty, the 32-bit
build gets hardly any testing these days, and not much love.

 -- Keir

On 16/12/2010 09:41, "ZhouPeng" <zpengxen@gmail.com> wrote:

> The bug exist in iommu(Intel VT-d) support code.
> 
> After I disabled the vt-d in bios, system can boot properly.
> 
> 2010/12/16 ZhouPeng <zpengxen@gmail.com>
>> The err msg appears in
>> void *map_domain_page(unsigned long mfn)
>>       BUG_ON(idx >= MAPCACHE_ENTRIES);
>> 
>> printk idx is 1024 and BUG_ON is called.
>> 
>> I print  Xen call trace msg:
>> 
>> [<ffcd3c2>]  map_domain_page+0x1a2/0x230
>> [<ff1cd718>] unmap_domain_page+0x148/0x160
>>                    addr_to_dma_page_maddr+0x1f6/0x250
>>                    __find_next_zero_bit+0x80/0x90
>>                    intel_iommu_map_page+0x14a/0x250
>>                    domain_context_mapping+0x14a/0x250
>>                    rmrr_identity_mapping+0xb7/0x120
>>                    intel_iommu_dom0_init+0x143/0x1eb
>>                    construct_dom0+0x138f/0x16b0
>>                    __start_xen+0x109a/0x1680
>>                    e820nf+0x0/0x4
>>                    __high_start+0x58/0x5a
>> 
>> 2010/12/16 Pasi Kärkkäinen <pasik@iki.fi>
>> 
>>> On Thu, Dec 16, 2010 at 03:41:17PM +0800, ZhouPeng wrote:
>>>>    (XEN) Panic on CPU 0:
>>>>    (XEN) Xen BUG at domain_page.c:102
>>>> 
>>>>    Any solutions?
>>>> 
>>> 
>>> You need to post the full boot log, including all output from both Xen and
>>> dom0 Linux.
>>> See: http://wiki.xen.org/xenwiki/XenSerialConsole
>>> 
>>> -- Pasi
>>> 
>>>>    2010/12/16 ZhouPeng <[1]zpengxen@gmail.com>
>>>> 
>>>>      Hi all,
>>>> 
>>>>      I build xen4.1 from the tarbll (with kernel 2.6.32.26 downloaded by
>>>>      default) on fedora8.
>>>> 
>>>>      After installing, I get the err msg on startup:
>>>> 
>>>>      (XEN) Panic on CPU 0:
>>>>      (XEN) Xen BUG at domain_page.c:102
>>>> 
>>>>      5 seconds later, the machine reboot.
>>>> 
>>>>      How to deal with this problem.
>>>> 
>>>>      Thanks,
>>>>      --
>>>>      Zhou Peng
>>>>      My daily E-Mail: [2]ailvpeng25@gmail.com
>>>> 
>>>>    --
>>>>    Zhou Peng
>>>>    My daily E-Mail: [3]ailvpeng25@gmail.com
>>>> 
>>>> References
>>>> 
>>>>    Visible links
>>>>    1. mailto:zpengxen@gmail.com
>>>>    2. mailto:ailvpeng25@gmail.com
>>>>    3. mailto:ailvpeng25@gmail.com
>>> 
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>>>> Xen-devel mailing list
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>>>> http://lists.xensource.com/xen-devel
>>> 
>> 
>>