I am using a kernel module that I modified slightly to work on my current kernel version. It is running on a virtual machine and on a heavy load it goes into an infinite loop and freezes the system. I can tell that the virtual machine is using 100% of its assigned cpu. There are print statements almost everywhere in the module, but after a few seconds none get printed.
The kernel has the following options already enabled: CONFIG_DETECT_SOFTLOCKUP and
CONFIG_DETECT_HUNG_TASK. To my understanding the kernel is supposed to print the stack trace when a hung task is detected, however, nothing gets printed in kern.log. I am not sure if this is the place where the kernel would dump the stack or if the print process is affected by the hang since the print statements in the module are not being printed as well.
I would like to know how to debug this issue. Any help is appreciated.
Thank you.
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