2012/11/27 Paul E. McKenney <paul...@linux.vnet.ibm.com>: > It is OK to call rcu_irq_exit() without a matching rcu_irq_enter() -only- > if you have also called rcu_idle_exit() since the last rcu_idle_enter(). > There will be a similar rule for rcu_user_exit(). > > More generally, it is OK to call rcu_irq_exit() without a matching > rcu_irq_enter() only if RCU believes that the CPU you are running on is > non-idle.
Perfect! > On 32-bit systems, you are only allowed a few tens of million > such unmatched rcu_irq_enter() calls in a given RCU-non-idle region. > > All courtesy of RCU's need to tolerate architectures that enter > interrupt handlers without ever leaving them and vice versa. ;-) RCU idle mode in a hostile environment ;-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
