On Mon, Nov 02, 2015 at 12:13:25PM -0500, Mike Marciniszyn wrote: > The current implementation gets a spin_lock, and at any scale with > qib and hfi1 post send, the lock contention grows exponentially > with the number of QPs. > > idr_find() is RCU compatibile, so read doesn't need the lock. > > Change to use rcu_read_lock() and rcu_read_unlock() in > __idr_get_uobj(). > > kfree_rcu() is used to insure a grace period between the > idr removal and actual free.
Looks OK to me. Reviewed-By: Jason Gunthorpe <[email protected]> Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
