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

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Thu, Dec 16, 2010 at 11:47:19AM +0000, Keir Fraser wrote:
> You might need a line like the following in /etc/fstab in dom0:
> none /proc/xen xenfs defaults 0 0
> 

And if that doesn't help then there's this wiki page with
troubleshooting info:

http://wiki.xen.org/xenwiki/XenCommonProblems#head-26434581604cc8357d9762aaaf040e8d87b37752

-- Pasi

>  -- Keir
> 
> On 16/12/2010 11:24, "ZhouPeng" <zpengxen@xxxxxxxxx> wrote:
> 
> > Thank you for your reply.
> > 
> > We want to  work in 32-bit system.
> > And fortunately we don't need IOMMU and passthr at the present.
> > 
> > There is another problem:
> > xend start failed
> > err msg is:
> > xen.lowlevel.xc.Error: (1, "Internal error"), 'Could not obtain handle on
> > privileged command interface (2 =  No such file or directory)'
> > 
> > I find there is nothing in "/proc/xen/" but there is privcmd.o in
> > "bulid-linux-2.6-pvos_x86_32/drivers/xen/xenfs/"
> > 
> > 2010/12/16 Keir Fraser <keir@xxxxxxx>
> >> 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@xxxxxxxxx> 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@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
> >>>>> 
> >>>> 
> >>>> 
> >> 
> >> 
> > 
> > 
> 
> 
> 
> _______________________________________________
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> http://lists.xensource.com/xen-devel

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