Panic (Reboot) On Hard Lockups

configname: CONFIG_BOOTPARAM_HARDLOCKUP_PANIC

Linux Kernel Configuration
└─>Kernel hacking
└─>Debug Oops, Lockups and Hangs
└─>Panic (Reboot) On Hard Lockups
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Say Y here to enable the kernel to panic on "hard lockups",
which are bugs that cause the kernel to loop in kernel
mode with interrupts disabled for more than 10 seconds (configurable
using the watchdog_thresh sysctl).

Say N if unsure.