Xen project Mailing List

Re: [Xen-devel] Re: Panic on cpu0

To: Pasi Kärkkäinen <pasik@xxxxxx>, stephen.spector@xxxxxxxxxx, keir.fraser@xxxxxxxxxxxxx

Date: Thu, 16 Dec 2010 17:41:11 +0800

Cc: "Xen-Devel \(E-mail\)" <xen-devel@xxxxxxxxxxxxxxxxxxx>

Delivery-date: Thu, 16 Dec 2010 01:41:53 -0800

Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=QTBmCT03A1IWgHjIgPiUAQYTK3xiRks/YLoC2AlH4HT/UoK1a8d3dg1ZjcLc0V0Qpu sRnZwEUuF1rhVlvRO8kTIDn9gYN+jA5d4GwBAGAYpQ1OEXT3hYnc+QRvOrzhHWbHOL7i u8u+ZpxjnVvuA26vfc/YqUBIHCE1YOiYYX+tk=

List-id: Xen developer discussion <xen-devel.lists.xensource.com>

2010/12/16 ZhouPeng <zpengxen@xxxxxxxxx>

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@xxxxxx>

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@xxxxxxxxx>

>
> 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@xxxxxxxxx
>
> --
> Zhou Peng
> My daily E-Mail: [3]ailvpeng25@xxxxxxxxx
>
> References
>
> Visible links
> 1. mailto:zpengxen@xxxxxxxxx
> 2. mailto:ailvpeng25@xxxxxxxxx
> 3. mailto:ailvpeng25@xxxxxxxxx

> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

--
Zhou Peng
My daily E-Mail: ailvpeng25@xxxxxxxxx

ailvpeng25@xxxxxxxxx

_______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel