On 11/10/2015 9:34 AM, Chuck Lever wrote:
2. Is there a reason IB is not using the allphys MR for RDMA Read? That would be much more efficient. On the NFS server that MR isn't exposed, thus it is safe to use.
True, but only if the layout of the buffer's physical pages do not exceed the local RDMA Read scatter limit. If the size is large then the privileged MR will require additional RDMA Read operations, which can be more expensive. It's certainly a valid optimization, if the buffer "fits". -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
