Re: [Xen-devel] 2.6.28 64-bit domU not booting

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2009-01-06 at 16:37 +0200, Valtteri Kiviniemi wrote:
> Hi,
> 
> No it does not print anything, just disappears immediately.
> 
> This is what I get in xm dmesg after trying to launch the domU with 2.6.28
> 
> http://pastebin.com/m6ab14265

Since they aren't huge please just paste the messages inline or attach
them rather than sending me off to some website.

Looks like a hypercall has failed and the kernel has done a BUG():

(XEN) mm.c:1482:d71 Bad L1 flags 800000
(XEN) traps.c:437:d71 Unhandled invalid opcode fault/trap [#6] on VCPU 0 
[ec=0000]
(XEN) domain_crash_sync called from entry.S
(XEN) Domain 71 (vcpu#0) crashed on cpu#0:
(XEN) ----[ Xen-3.3.1-rc1-pre  x86_64  debug=n  Not tainted ]----
(XEN) CPU:    0
(XEN) RIP:    e033:[<ffffffff8020a7aa>]
(XEN) RFLAGS: 0000000000000282   EM: 1   CONTEXT: pv guest
(XEN) rax: 00000000ffffffea   rbx: 8000000000000161   rcx: 0000000000000008
(XEN) rdx: 0000000000000000   rsi: 80000001d9ddd061   rdi: ffffffff80622000
(XEN) rbp: 0000000001000000   rsp: ffffffff80599f58   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) r12: ffffffff80622000   r13: 0000000000000200   r14: 0000000000001000
(XEN) r15: 0000000000000800   cr0: 000000008005003b   cr4: 00000000000026b0
(XEN) cr3: 00000001d9cef000   cr2: 0000000000000000
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: e02b   cs: e033
(XEN) Guest stack trace from rsp=ffffffff80599f58:
(XEN)    0000000000000008 0000000000000000 ffffffff8020a7aa 000000010000e030
(XEN)    0000000000010082 ffffffff80599f98 000000000000e02b ffffffff8020a7a6
(XEN)    ffffffff8020c18c 0000000000000200 0000000000000008 ffffffff805c4d3f
(XEN)    ffffffff80710000 0000000000010000 0000000000000008 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 ffffffff8068d000 ffffffff8068e000 ffffffff8068f000
(XEN)    ffffffff80690000 ffffffff80691000 ffffffff80692000 ffffffff80693000
(XEN)    ffffffff80694000 ffffffff80695000 ffffffff80696000 ffffffff80697000
(XEN)    ffffffff80698000 ffffffff80699000 ffffffff8069a000 ffffffff8069b000
(XEN)    ffffffff8069c000 ffffffff8069d000 ffffffff8069e000 ffffffff8069f000
(XEN)    ffffffff806a0000 ffffffff806a1000 ffffffff806a2000 ffffffff806a3000
(XEN)    ffffffff806a4000 ffffffff806a5000 ffffffff806a6000 ffffffff806a7000
(XEN)    ffffffff806a8000 ffffffff806a9000 ffffffff806aa000 ffffffff806ab000
(XEN)    ffffffff806ac000 ffffffff806ad000 ffffffff806ae000 ffffffff806af000
(XEN)    ffffffff806b0000 ffffffff806b1000 ffffffff806b2000 ffffffff806b3000
(XEN)    ffffffff806b4000 ffffffff806b5000 ffffffff806b6000 ffffffff806b7000
(XEN)    ffffffff806b8000 ffffffff806b9000 ffffffff806ba000 ffffffff806bb000
(XEN)    ffffffff806bc000 ffffffff806bd000 ffffffff806be000 ffffffff806bf000
(XEN)    ffffffff806c0000 ffffffff806c1000 ffffffff806c2000 ffffffff806c3000
(XEN)    ffffffff806c4000 ffffffff806c5000 ffffffff806c6000 ffffffff806c7000

What does ffffffff8020a7aa correspond to in your kernel? Do any of the
other values on the stack correspond to interesting functions? I usually
pipe such stack traces into "| gdb-disas vmlinux" (attached, needs
kernel with debug info), of course it would be better to update to 3.3.1
final and build with debugging enabled to see the actual stack trace
from the domU kernel.


> - Valtteri Kiviniemi
> 
> Ian Campbell kirjoitti:
> > On Mon, 2009-01-05 at 20:11 +0200, Valtteri Kiviniemi wrote:
> >> Hi,
> >>
> >> I don't have the opportunity of rebuilding my hypervisor right now, but
> >> here is the .config:
> >>
> >> http://pastebin.com/m181cf183
> >>
> >> Is there something wrong with the config or am I missing something there?
> > 
> > No I think your config is ok, I successfully built and booted 2.6.28 as
> > a 64 bit domU on my test system using it. My command line was
> > "root=/dev/xvda1 ro 4 console=hvc0 earlyprintk=xen"
> > 
> > Do you get anything on the Xen console (xm dmesg) when you try to start
> > the guest?
> > 
> > 
> >> - Valtteri Kiviniemi
> >>
> >> Ian Campbell kirjoitti:
> >>> On Mon, 2009-01-05 at 14:19 +0200, Valtteri Kiviniemi wrote:
> >>>> Hi,
> >>>>
> >>>> Im using vanilla 2.6.28 kernel from kernel.org and when I try to boot my 
> >>>>   domU with it, it just disappears without any error or warning.
> >>> Can you build a debug=y hypervisor and add earlyprintk=xen to the domU
> >>> command line?
> >>>
> >>>> I have double checked that I have all the necessary options enabled on 
> >>>> my kernel config.
> >>> Can you supply the config pls.
> >>>
> >>> Ian.
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Xen-devel mailing list
> >>> Xen-devel@xxxxxxxxxxxxxxxxxxx
> >>> http://lists.xensource.com/xen-devel
> >>
> >> _______________________________________________
> >> Xen-devel mailing list
> >> Xen-devel@xxxxxxxxxxxxxxxxxxx
> >> http://lists.xensource.com/xen-devel
> > 
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel

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