[Crash-utility] crash can't handle virsh dump file

[Gui Jianfeng]

Dave Anderson wrote:
> Hi Gui,
> 
> This is the patch that is queued for the next release:  
> 
>  http://people.redhat.com/anderson/qemu_block_kvmclock_devices.patch

Hi Dave,

Thanks for the patch, i'd like to try it.

Thanks
Gui

> 
> I've tested it against the dumpfile that you made available.
> 
> Thank you for your help, and to Paolo for the patch.
> 
> Dave
> 
> ----- "Gui Jianfeng" <guijianfeng at cn.fujitsu.com> wrote:
> 
>> Gui Jianfeng wrote:
>>> Dave Anderson wrote:
>>>> ----- "Gui Jianfeng" <guijianfeng at cn.fujitsu.com> wrote:
>>>>
>>>>> Dave Anderson wrote:
>>>>>> ----- "Dave Anderson" <anderson at redhat.com> wrote:
>>>>>>
>>>>>>> ----- "Paolo Bonzini" <pbonzini at redhat.com> wrote:
>>>>>>>
>>>>>>>>> According to coredump, seems crash crashed at get_idt_base().
>>>>>>>>> device_find_instance() fails to find "cpu" instance.
>>>>>>>> I think Dave already has a patch for this.
>>>>>>>>
>>>>>>>> Paolo
>>>>>>> The patch for get_idt_base() was put in crash version 5.0.4.
>>>>>>> Looking back at the mail archives, though, I don't see what
>>>>>>> version Gui is/was using?
>>>>>>>
>>>>>>> Dave
>>>>>> Now I see with the crash debug output that Gui is using version
>>>>>> 5.0.3.  Can you please retry Paolo's patch on top of version
>>>>>> 5.0.4?
>>>>>>
>>>>> Hi Dave,
>>>>>
>>>>> I did apply Paolo's patch on top of version 5.0.4, the bug is
>> still there.
>>>>> I checked the 5.0.4 changelog and didn't see the fix for this.
>>>> Sorry, the 5.0.4 fix I was referring to was in get_kernel_base(),
>> which is 
>>>> called with the result from get_idt_base().  So, just to be clear,
>> when it
>>>> crashes in get_idt_base(), it's because device_find_instance() call
>> returns
>>>> a NULL?
>>> That's true.
>>>
>>>>   static uint64_t
>>>>   get_idt_base(struct qemu_device_list *dl)
>>>>   {
>>>>           struct qemu_device_x86 *dx86 = (struct qemu_device_x86
>> *)
>>>>                   device_find_instance (dl, "cpu", 0);
>>>>
>>>>           return dx86->idt.base;
>>>>   }
>>>>
>>>> So, it seems that with Paolo's patch, it can find the "block" device, but
>>>> then can no longer find the "cpu" device?
>>> Yes.
>>>
>>>> Can you make a vmlinux/vmcore pair available for me to download?
>>> Ok, will do later.
>> Hi Dave,
>>
>> Please use the following link to download the vmlinux/vmcore
>>
>> http://dl.dropbox.com/u/4918988/core.dump
>> http://dl.dropbox.com/u/4918988/f12_vmlinux
>>
> 
>