[PATCH 0/2] vmcoreinfo support for dump filtering #2
rdunlap at xenotime.net
Mon Sep 10 14:35:21 EDT 2007
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?
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).
*** Remember to use Documentation/SubmitChecklist when testing your code ***
More information about the kexec