I am debugging the madwifi wireless driver for which I installed the Kdump/Kexec utility. The dump (vmcore) is created for kernel panics which occur due to the driver (The driver code has assert() functions which call BUG() to panic the kernel)
However sometimes when the driver module is reset or loaded, the following error is displayed on the console ( also in /var/log/messages) after which the machine goes for a freeze.
In this case, the machine doesn't boot into the secondary kernel (crash kernel) to create the dump - It just stays in the freeze state. Why so? How can I debug such scenarios where Kdump fails.
I am using Linux vanilla kernel 126.96.36.199 on fedora 9. Both main and secondary kernel have this version of kernel.
I am pretty new to kernel debugging, please advice me how I can avoid or debug this kernel oops.
NC State University
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