Expedited RCU CPU stall timeout in milliseconds


Linux Kernel Configuration
└─>Kernel hacking
└─>RCU Debugging
└─>Expedited RCU CPU stall timeout in milliseconds
In linux kernel since version 5.2 (release Date: 2019-07-07)  
If a given expedited RCU grace period extends more than the
specified number of milliseconds, a CPU stall warning is printed.
If the RCU grace period persists, additional CPU stall warnings
are printed at more widely spaced intervals. A value of zero
says to use the RCU_CPU_STALL_TIMEOUT value converted from
seconds to milliseconds.