On Fri, Aug 21, 2015 at 8:33 AM, <Valdis.Kletnieks@vt.edu> wrote:

On Fri, 21 Aug 2015 07:06:58 -0400, Salam Farhat said:

> 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.

Try giving the VM a second virtual CPU, if you have only one CPU and it
gets hung sufficiently hard, the debugging stuff won't have a chance to run.

Oh, and make sure you configure your kernel for SMP.

It has 4 cores and kernel is already configured for smp.

Sysrq is a pretty cool option, but other than reboot almost no other commands run including 'e', 'f', ;i;.

It seems I might have to resort to debugging by the process of elimination (removing code until it doesn't hang and so on.. ).

Any other ideas I would appreciate it.