Re: What are the general causes of frozen system?

> What should I consider as a cause of the freeze? I have reviewed the 
> code and do not find any obvious out-of-bounds memory references. I have 
> tried various 'printk' statements, but none of them in the bottom-half 
> interrupt routine make it to the logs. Are there any tricks that I 
> should try?

Look for lock-related deadlocks.  Try turning on the nmi watchdog
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