Provide additional RCU stall debug information


Linux Kernel Configuration
└─>Kernel hacking
└─>RCU Debugging
└─>Provide additional RCU stall debug information
In linux kernel since version 6.3 (release Date: 2023-04-23)  
Collect statistics during the sampling period, such as the number of
(hard interrupts, soft interrupts, task switches) and the cputime of
(hard interrupts, soft interrupts, kernel tasks) are added to the
RCU stall report. For multiple continuous RCU stalls, all sampling
periods begin at half of the first RCU stall timeout.
The boot option rcupdate.rcu_cpu_stall_cputime has the same function
as this one, but will override this if it exists.