On Tue, Oct 19, 2021 at 11:35:30AM -0500, Bob Pearson wrote: > Take a look at the note I copied you on more recently. There is some > progress but not complete elimination of rxe_pool. There is another > project suggested by Jason which is replacing red black trees by > xarrays as an alternative approach to indexing rdma objects. This > would still duplicate the indexing done by rdma-core. A while back I > looked at trying to reuse the rdma-core indexing but no effort was > made to make that easy. I have no expecation that a driver can re-use the various rdma-core indexes.. that is not what they are for, and they have a different lifetime semantic from wha the driver needs. > of the APIs are private to rdma-core. These indices are managed by > the rxe driver for use as lkeys/rkeys, qpns, srqns, and more > recently address handles. xarrays seem to be more efficient when the > indices are fairly compact. There is a suggestion that IB and RoCE > should attempt to make indices that are visible on the network more > sparse. Nothing will make them secure but they could be a lot more > secure than they are currently. I believe mlx5 is now using random > keys for this reason. Only qpn really benifits from something like this, and it is more about maximum lifetime before qpn re-use which is a cyclic allocating xarray. Jason
