> This happens in only two cases: > > 1. CONFIG_PREEMPT_RCU=n kernels. But in this case, rcu_read_unlock() > and rcu_read_lock() are free, at least for CONFIG_PROVE_LOCKING=n > kernels. And if you have CONFIG_PROVE_LOCKING=y, any contribution > from rcu_read_unlock() and rcu_read_lock() will be in the noise. Oh argh.. I completely overlooked that rcu_read_{,un}lock() are NOPs for PREEMPT=n kernels. /me crawls back under his stone.. -- To unsubscribe from this list: send the line "unsubscribe lvs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html