Are you aware of the fact that openSUSE 12.2 is not suported anymore?
Thus there are not many people that can try to do what you do, because they do not have a 12.2 running to check what you did. Also it is quite possible (my memory does not go back that far) that 12.2 is a legacy Grub system and not a GRUB2 system as all at the moment supported openSUSE version are.
12.2 was the first version that used grub2 as default boot loader, otherwise I fully agree…
It might even be possible that 12.2’s kernel didn’t even support the crashkernel parameter yet (no idea), although I think that you wouldn’t get that particular error message then (unless you installed kexec from somewhere else than the standard repos).
I’d suggest to post your exact kernel command line as a start though:
cat /proc/cmdline
Copy and paste the result.
Maybe you just made a mistake?
It seems fine. But when i run kexec -p “kernel version” the output is :-
kexec -p /boot/vmlinuz-3.4.6-kdump
Memory for crashkernel is not reserved
Please reserve memory by passing “crashkernel=X@Y” parameter to the kernel
Then try loading kdump kernel
Could you please help here?
In opensuse 12.2 kexec is already installed. I have tried the similar in version 11.2, but i have installed kexec manually, and there it worked.
Could you please suggest, what possible is needed to be done?
The problem is resloved by using just crashkernel=64M instead of crashkernel=64M@16M.
Now, I am facing another problem.
I have started kexec and the manually crashed the kernel using echo c > /proc/sysrrq-trigger.
As expected core file is generated. But when I tried to analyze the issue using the command :-
gdb /boot/vmlinuz vmcore_1GNU gdb (GDB) SUSE (7.4.50.20120603-2.1.2)
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This GDB was configured as “i586-suse-linux”.
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Reading symbols from /boot/vmlinuz…(no debugging symbols found)…done.
warning: core file may not match specified executable file.
[New process 1]
[New LWP 3538] #0 0x00000015 in ?? ()
(gdb) bt #0 0x00000015 in ?? () #1 0x5b2cc483 in ?? () #2 0xc35d5f5e in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
Can anyone please help How to get these debug symbols? In the kernel config
Normally the debug symbols are stripped out after building the packages and put into a separate xxx-debuginfo package.
So try to install the corresponding -debuginfo package for your kernel (those are normally found in the debug and update-debug repos), e.g. kernel-desktop-debuginfo.
Or did you compile that kernel yourself?
