What Happens When a Deadlock Occurs in Linux Driver Code?
When writing a “dead loop” in the Linux kernel (<span><span>while(1);</span></span> or <span><span>for(;;);</span></span>), what happens depends on three key factors: On which CPU the code runs and at what priority (interrupt context or process context); Whether kernel preemption is enabled; Whether the CPU is responsible for maintaining system heartbeat (tick, RCU, scheduling clock, IPI, etc.). Let’s … Read more