Re: [Xen-devel] Domain-0 kernelbootfailurewithxen-unstableandlinux-2.6.18-xen

[Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>]

Thu, 14 Jan 2010 20:42:07 +0900, Masaki Kanno wrote:

>Thu, 14 Jan 2010 11:26:12 +0000, Keir Fraser wrote:
>
>>On 14/01/2010 11:07, "Masaki Kanno" <kanno.masaki@xxxxxxxxxxxxxx> wrote:
>>
>>> Hi Jan,
>>> 
>>> Thu, 14 Jan 2010 09:05:32 +0000, "Jan Beulich" wrote:
>>> 
>>>> You forgot to tell us in what way the boot fails.
>>> 
>>> Oops!  Could you refer to the following about a serial log when the
>>> problem occurred?
>>> 
>>> http://lists.xensource.com/archives/html/xen-devel/2010-01/msg00338.html
>>> 
>>> Accurately, the problem is not "Domain-0 kernel boot fails" but "Domain-
>>> 0 kernel boot does not start".
>>
>>I don't know how much experience with kernel issues you have, but I would
>>take the EIP from the CPU0 guest dump in that log file (the EIP is c01edc67)
>>and look at that code address in a disassembly of the dom0 kernel image
>>(objdump -d vmlinux). Seeing what function you're in would be a good start.
>>'addr2line -e vmlinux c01edc67' would also be useful: tells you the source
>>file and line number.
>>

I was not able to have enough working times to investigate the 
problem today.  The problem still occurs with xen-4.0.0-rc2-pre.
Attached the serial log.  EIP:c01ed6c7 is the following function.

c01ed6b0 <read_current_timer>:
c01ed6b0:       81 3d 54 1f 37 c0 80    cmpl   $0xc01ed680,0xc0371f54
c01ed6b7:       d6 1e c0 
c01ed6ba:       89 c1                   mov    %eax,%ecx
c01ed6bc:       b8 ff ff ff ff          mov    $0xffffffff,%eax
c01ed6c1:       74 02                   je     c01ed6c5 
<read_current_timer+0x15>
c01ed6c3:       f3 c3                   repz ret 
c01ed6c5:       0f 31                   rdtsc  
c01ed6c7:       89 01                   mov    %eax,(%ecx)
c01ed6c9:       31 c0                   xor    %eax,%eax
c01ed6cb:       c3                      ret    
c01ed6cc:       8d 74 26 00             lea    0x0(%esi),%esi

Best regards,
 Kan

Attachment: COM1_20100115.log
Description: Binary data

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