/proc/sys/kernel/hung_task_verbosity

The sysctl setting kernel.hung_task_verbosity is available since kernel 042stab056.2. It controls what to show when kernel reports about a hung task (i.e. in check_hung_task() function).

The following bits are defined:

Value	SysRQ key	Description
1	sysrq-p	CPUs
2	sysrq-t	Tasks
4	sysrq-m	Memory
8	sysrq-a	Scheduler
0	-	Nothing (this is the default)
-1	-	Everything