内核线程死锁导致系统挂起

http://www.nico.schottelius.org/blog/reboot-linux-if-task-blocked-for-more-than-n-seconds/

# Reboot 5 seconds after panic
kernel.panic = 5

# Panic if a hung task was found
kernel.hung_task_panic = 1

# Setup timeout for hung task to 300 seconds
kernel.hung_task_timeout_secs = 300

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转载自gelongmei.iteye.com/blog/2225257