[kvm-devel] kvm-67: kernel panic while booting debian-40r3-i386-businesscard.iso

[Jan L. <jl...@la...>]

Hi!

I'm preparing kvm-67 for debian. While testing i noticed a problem:

When booting the debian installer from the official CD [1] this problem:

CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 2048K
Compat vDSO mapped to ffffe000.
CPU: Intel QEMU Virtual CPU version 0.9.1 stepping 03
Checking 'hlt' instruction... OK.
ACPI: Core revision 20060707
invalid opcode: 0000 [#1]
Modules linked in:
CPU:    0                           
EIP:    0060:[<c01467be>]    Not tainted VLI
EFLAGS: 00010202   (2.6.18-6-486 #1)
EIP is at kmem_cache_zalloc+0x2a0x53
eax: 0000000a   ebx: c7fe75c0   ecx: c7fe9e00   edx: 000000d0
esi: c02c50c0   edi: 00000202   ebp: c036bd20   esp: c030ff80
ds: 007b   es: 007b   ss: 0068    
Process swapper (pid: 0, ti=c030e000 task=c02bd7a0 task.ti=c030e000)
Stack: 00000004 c028f968 c029c49a c0146d5b 00000004 00000000 00000014
c029c499
       00000046 c030ffc4 00000046 00000046 00000000 00000000 00039100
c0302800
       003a7007 c01c7e90 00000000 00000000 00000000 c01db3b5 c0378ce8
c01dcf07
Call Trace:                     
 [<c0146d5b>] kmem_cache_create+0x15e0x410
 [<c01c7e90>] acpi_os_create_cache+0x100x1c
 [<c01db3b5>] acpi_ut_create_caches+0x190x93
 [<c01dcf07>] acpi_ut_init_globals+0x50x1de
 [<c01dc5d1>] acpi_initialize_subsystem+0x1b0x56
 [<c0323a73>] acpi_early_init+0x450xfe
 [<c03105f5>] start_kernel+0x26b0x272
Code: c3 57 56 53 89 c6 9c 5f fa 8b 08 83 39 00 74 12 c7 41 0c 01 00 00
00 8b 01
 48 89 01 8b 5c 81 10 eb 07 e8 a5 fb ff ff 89 c3 57 9d <0f> 0d 0b 90 85
db 74 1b
 8b 56 10 31 c0 89 d1 c1 e9 02 89 df f3
EIP: [<c01467be>] kmem_cache_zalloc+0x2a0x53 SS:ESP 0068:c030ff80
 <0>Kernel panic - not syncing: Attempted to kill the idle task!

Similar errors in acpi-functions also happen with all other linux
kernels i have here (2.6.22-25). -no-acpi makes no difference.

Userspace 66 works (with -66 and -67 kernel module), userspace 67 has
this problem (with -66 and -67 kernel module).

Host is an ThinkPad X60 (Core Duo), kernel 2.6.25.

I've tried to bisect the userspace, but the bug seems to be introduced
with the merge from qemu-cvs. Any tips on how to bisect the individual
commits on the qemu-cvs branch?

Thanks,
Jan Lübbe

[1]: http:cdimage.debian.orgdebian-cd4.0_r3i386iso-cddebian-40r3-i386-businesscard.iso