machine_kexec() stuck at load_segments() in arch/x86/kernel/machine_kexec_64.c

Subin P T ptsubin at gmail.com
Thu Mar 7 01:31:10 PST 2019


Hello,

I am trying to get kdump to work on my platform with Intel Denverton, 
Intel(R) Atom(TM) CPU C3758. SInce I couldn't see the new kernel being 
loaded, I have tried adding printk s and figured out this is being stuck 
in load_segments(). This is windriver Linux 7 distribution and kernel 
version is 3.14 with critical fixes from upstream. I couldn't find any 
major changes in kexec related files compared to what is there in 
current WRL7. On another device with Intel(R) Atom(TM) CPU  C2718, this 
is working fine without any problem. Below is the output of kexec load 
command. With kexec -e, all I see is [ 6332.507960] Starting new kernel.

Can you please help me identify the problem with some pointers on how to 
proceed with the debug or what places do I need to start looking?

The output of kexec -l: https://pastebin.com/4zgArfKw

I have this in dmesg
[    0.000000] Reserving 256MB of memory at 640MB for crashkernel 
(System RAM: 16350MB)

Thanks and Regards,
Subin



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