[Crash-utility] Re: [PATCH 0/2] vmcoreinfo support for dump filtering #2
pdelaney at bluelane.com
Tue Sep 11 00:45:43 EDT 2007
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.
> 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:
>>> 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.
>>> 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.
>> 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).
> Crash-utility mailing list
> Crash-utility at redhat.com
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