On 12/09, Paul E. McKenney wrote: > > Would wait_event()/wake_up() work for the wakeup-writer case?
Yes, and in this case we could probably kill this puts_pending logic and avoid cpu_hotplug.lock in put_online_cpus() altogether? Can't we just make cpu_hotplug.refcount atomic_t? Anyway, this makes me think again that this code should use percpu_rwsem. Perhaps I'll try to make a patch next week... (we need down_write_recursive_readers(), and probably rcusync patches). 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/
