Trying to understand, how and where grace period in an RCU is initialized. Is there a static declaration somewhere in Linux Kernel to define the grace period, or are there some other complex ways to do this, for example as per this small snippet:
for_each_online_cpu(cpu)
run_on(cpu);
grace period is total time taken to run the current thread on all the CPUs and after this total time has elapsed all the readers are done their critical sections ?
