Enable tracing for RCU

configname: CONFIG_RCU_TRACE

Linux Kernel Configuration
└─>RCU Debugging
└─>Enable tracing for RCU
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
This option provides tracing in RCU which presents stats
in debugfs for debugging RCU implementation.

Say Y here if you want to enable RCU tracing
Say N if you are unsure.