On Tue, Jan 17, 2017 at 08:37:45AM -0800, Tejun Heo wrote: > The call sequence doesn't matter. Whether you're using call_rcu() or > rcu_barrier(), you're just waiting for a grace period to pass before > continuing. It doens't give any other ordering guarantees, so the new > code should be equivalent to the old one except for being asynchronous. Oh I was confusing synchronize_rcu() with rcu_barrier(), so you're right, kmem_cache struct needs to stay around for the slab pages to be freed after RCU grace period. Will revise the patch accordingly, thanks. Thanks. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>