On 08/03, Paul E. McKenney wrote: > > On Mon, Aug 04, 2014 at 08:37:37AM +0800, Lai Jiangshan wrote: > > An alternative solution: > > srcu_read_lock() before exit_notify(), srcu_read_unlock() after the last > > preempt_disable() > > in the do_exit, and synchronize_srcu() in rcu_tasks_kthread(). > > That is a good way to synchronize with the exiting tasks, and I will > probably that that approach. > > I -thought- that Oleg was concerned about safely building the list to > start with, though.
But for_each_process_thread() under rcu_read_lock() should work except it can miss the exiting tasks. So it seems that the clever Lai's trick should solve the problem. Oleg. -- 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/
