Sleep inside atomic section checking

configname: CONFIG_DEBUG_ATOMIC_SLEEP

Linux Kernel Configuration
└─>Sleep inside atomic section checking
In linux kernel since version 3.1 (release Date: 2011-10-24)  
If you say Y here, various routines which may sleep will become very
noisy if they are called inside atomic sections: when a spinlock is
held, inside an rcu read side critical section, inside preempt disabled
sections, inside an interrupt, etc...