[Fwd: [Crash-utility] crash warnings]

[David Wilder]

Vivek Goyal wrote:

>On Thu, May 04, 2006 at 03:08:14PM -0400, Dave Anderson wrote:
>  
>
>>>Right, but something is fundamentally wrong with your
>>>vmcore:
>>>
>>>                  p_paddr  p_filesz
>>>First segment:          0      8000
>>>Second segment:      8000   1ff7fff
>>>Third segment:   2fd0f001  d02f0fff
>>>
>>>It cannot have a p_paddr address that is not page-aligned,
>>>nor can you have a p_filesz that is not page-aligned.
>>>
>>>Dave
>>>      
>>>
>>Vivek et al,
>>
>>Have there been any recent changes to the kdump code
>>that might cause strange PT_LOAD segment contents?
>>
>>    
>>
>
>Dave, As per my knowledge nothing has changed. Generally PT_LOAD headers are
>generated from user space while kernel is being loaded and second kernel
>leaves them untouched except updating the offset field. So there are 
>high chances that user space itself is not generating right headers while
>loading the capture kernel.
>
>Dave Wilder, can you put some debugging statement in kexec-tools and see
>what header values are being generated from user space and do they match
>with what /proc/vmcore is showing.
>
>I will do some experiments on x86_64.
>
>Thanks
>Vivek 
>
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>
>  
>
I lost the system for the day.  But I should get it back on Friday to 
try your suggestion.

-- 
David Wilder
IBM Linux Technology Center
Beaverton, Oregon, USA 
dwilder at us.ibm.com
(503)578-3789