On Wed, Jun 24, 2015 at 10:10:17AM -0700, Paul E. McKenney wrote: > > The thing is, once you start bailing on this condition your 'queue' > > drains very fast and this is around the same time sync_rcu() would've > > released the waiters too. > > In my experience, this sort of thing simply melts down on large systems. > I am reworking this with multiple locks so as to keep the large-system > contention down to a dull roar.
So with the MCS queue we're got less global trashing than you had with the start/done tickets. Only the queue head on enqueue. -- 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/
