On 01/13, Peter Zijlstra wrote: > > On Mon, Jan 13, 2014 at 06:06:09PM +0100, Oleg Nesterov wrote: > > > > And I just realized that rcu_lock_acquire() does lock_acquire(check => 1). > > Probably we can mark rcu_lock_map's as __lockdep_no_validate__. > > Can't, RCU needs its own classes. Otherwise it cannot tell which version > of the RCU read lock its holding at just that moment.
Ah, indeed. Thanks. Can't it do lock_acquire(trylock => 1, read => 2) ? this still means mark_irqflags(), but perhaps this won't hurt too much. > At the very least we can reduce check to a single bit. Or this, yes. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
