RE: [Xen-devel] dom0 kernel crashes with kernel panic during boot

[Jan Kundrat <jan.kundrat@xxxxxx>]

On 2004-11-15, 09:42, Ian Pratt wrote:

> 
> > I've just built xen & dom0 kernel from gentoo ebuilds 
> > (bugs.gentoo.org), but my dom0 kernel crashes during boot.
> > Any help is appreciated. Console log, grub.conf and .config 
> > are included, machine is celeron/466, 128MB of RAM.
> 
> The 'unknown bootoption' is quite interesting. Please can you see what
> happens if you remove the ",15200n8".

",115200n8", I assume. This error occured also only with "ro 
root=/dev/hda3", without serial console, but dump was longer than one 
screen. Anyway, here it goes, including some garbage at the beggining 
which could be caused by grub attempting to use the same serial port:

./bin/miniterm -b9600
** ctrl-b quits miniterm **
ĎÍýÍĺLinux version 2.6.9-xen0 (root@zirafa) (gcc version 3.3.4 20040623 
(GentooLinux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)) #2 Sun Nov 14 19:19:39 CET 
2004
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000002000000 (usable)
32MB LOWMEM available.
DMI not present.
Built 1 zonelists
Kernel command line: root=/dev/hda3 ro console=ttyS0
Initializing CPU#0
PID hash table entries: 256 (order: 8, 4096 bytes)
Xen reported: 467.735 MHz processor.
Using tsc for high-res timesource
Console: colour VGA+ 80x25
Linux version 2.6.9-xen0 (root@zirafa) (gcc version 3.3.4 20040623 (Gentoo 
Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)) #2 Sun Nov 14 19:19:39 CET 2004
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000002000000 (usable)
32MB LOWMEM available.
DMI not present.
Built 1 zonelists
Kernel command line: root=/dev/hda3 ro console=ttyS0
Initializing CPU#0
PID hash table entries: 256 (order: 8, 4096 bytes)
Xen reported: 467.735 MHz processor.
Using tsc for high-res timesource
Console: colour VGA+ 80x25
Unable to handle kernel NULL pointer dereference at virtual address 
00000000
 printing eip:
c010ad74
*pde = ma 00000000 pa 55555000
 [<c0107a1b>] evtchn_do_upcall+0xab/0x110

 [<c010c8bb>] hypervisor_callback+0x33/0x49

 [<c010796a>] force_evtchn_callback+0xa/0x10

 [<c02f0760>] start_kernel+0x170/0x190

 [<c02f0350>] unknown_bootoption+0x0/0x180

Oops: 0002 [#1]
PREEMPT
Modules linked in:
CPU:    0
EIP:    0061:[<c010ad74>]    Not tainted VLI
EFLAGS: 00211286   (2.6.9-xen0)
EIP is at do_IRQ+0x94/0x1b0
eax: c02b1d60   ebx: 00000ff4   ecx: c02b4880   edx: c02b4880
esi: 00000000   edi: c02ef000   ebp: c02eb800   esp: c02eff5c
ds: 0069   es: 0069   ss: 0069
Process swapper (pid: 0, threadinfo=c02ef000 task=c02b1d60)
Stack: 00000080 c011cbde c031ed40 c02b4880 00000008 00000000 fbffc000 
00000000
       c0107a1b 00000080 c02effa8 00000001 c02effa8 00000000 c033e200 
c0310220
       c02ef000 c010c8bb c02effa8 00000000 c02b5b84 00000000 c033e200 
c0310220
Call Trace:
 [<c011cbde>] __call_console_drivers+0x5e/0x60

 [<c0107a1b>] evtchn_do_upcall+0xab/0x110

 [<c010c8bb>] hypervisor_callback+0x33/0x49

 [<c010796a>] force_evtchn_callback+0xa/0x10

 [<c02f0760>] start_kernel+0x170/0x190

 [<c02f0350>] unknown_bootoption+0x0/0x180

Code: 0c 85 c9 74 7c 89 df 8b 35 00 d0 30 c0 ff 4f 14 8b 47 08 a8 08 0f 85 
16 01 00 00 39 f7 0f 84 ed 00 00 00 8b 07 8d 9e f4 0f 00 00 <89> 06 89 e0 
89 46 30 8b 54 24 0c 89 96 fc 0f 00 00 8b 44 24 28
 <0>Kernel panic - not syncing: Fatal exception in interrupt



My vmlinux has been built using DistCC, so I'll recompile it once again.
Current vmlinux is available at 
http://home-hep.fzu.cz/kundratj/dev/xen/vmlinux-2.6.9-xen0-distcc
other interresting files could be
http://home-hep.fzu.cz/kundratj/dev/xen/System.map-2.6.9-xen0-distcc
http://home-hep.fzu.cz/kundratj/dev/xen/xen-syms
http://home-hep.fzu.cz/kundratj/dev/xen/xen.gz

-- 
Jan Kundrat
jan.kundrat@xxxxxx



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