I am trying to make use of kexec / kdump stuffs to debug kernel crashes. I am able to load the crash kernel successfully and I am able to dump the vmcore from crash kernel.
Process /proc/vmcore ... 0 -r-------- 1 root root 3.8G Jan 1 00:02 /proc/vmcore
But when I try to use vmcore-dmesg to extract the crash log I am getting the below error and the crash log file is 0 byte.
Generate crash log: No program header covering vaddr 0xffffff8008ba3560found kexec bug? -rw-r--r-- 1 root root 0 Jan 1 00:02 crash.log
When I did some research on this I found a patch related to this (https://patchwork.kernel.org/patch/9273231/). But, it didn't help.
main kernel and crash kernel versions are different. Do I need to use same version for both the kernels? any idea on this ?
Thanks
