[Crash-utility] Re: [PATCH 0/2] vmcoreinfo support for dump filtering #2

[Piet Delaney]

Vivek Goyal wrote:

How do I subscribe to the kexec mailing list on lists.infradead.org?
I tried majordomo, as on vger, but it didn't work.

-piet

> On Mon, Sep 10, 2007 at 11:35:21AM -0700, Randy Dunlap wrote:
>   
>> On Fri, 7 Sep 2007 17:57:46 +0900 Ken'ichi Ohmichi wrote:
>>
>>     
>>> Hi,
>>>       
>>> I released a new makedumpfile (version 1.2.0) with vmcoreinfo support.
>>> I updated the patches for linux and kexec-tools.
>>>
>>> PATCH SET:
>>> [1/2] [linux-2.6.22] Add vmcoreinfo
>>>   The patch is for linux-2.6.22.
>>>   The patch adds the vmcoreinfo data. Its address and size are output
>>>   to /sys/kernel/vmcoreinfo.
>>>
>>> [2/2] [kexec-tools] Pass vmcoreinfo's address and size
>>>   The patch is for kexec-tools-testing-20070330.
>>>   (http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/)
>>>   kexec command gets the address and size of the vmcoreinfo data from
>>>   /sys/kernel/vmcoreinfo, and passes them to the second kernel through
>>>   ELF header of /proc/vmcore. When the second kernel is booting, the
>>>   kernel gets them from the ELF header and creates vmcoreinfo's PT_NOTE
>>>   segment into /proc/vmcore.
>>>       
>> Hi,
>> When using the vmcoreinfo patches, what tool(s) are available for
>> analyzing the vmcore (dump) file?  E.g., lkcd or crash or just gdb?
>>
>> gdb works for me, but I tried to use crash (4.0-4.6 from
>> http://people.redhat.com/anderson/) and crash complained:
>>
>> crash: invalid kernel virtual address: 0  type: "cpu_pda entry"
>>
>> Should crash work, or does it need to be modified?
>>
>>     
>
> Hi Randy,
>
> Crash should just work. It might broken on latest kernel. Copying it
> to crash-utility mailing list. Dave will be able to tell us better.
>
>   
>> This is on a 2.6.23-rc3 kernel with vmcoreinfo patches and a dump file
>> with -l 31 (dump level 31, omitting all possible pages).
>>
>>     
>
> Thanks
> Vivek
>
> --
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> Crash-utility at redhat.com
> https://www.redhat.com/mailman/listinfo/crash-utility
>   

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