We are registering iobuf_pool with rdma. When rdma transport is unloaded, we need to deregister all the buffers registered with rdma. Otherwise iobuf_arena destroy will fail. Also if rdma.so is loaded again, then register iobuf_pool with rdma Change-Id: Ic197721a44ba11dce41e03058e0a73901248c541 BUG: 1200704 Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com> Reviewed-on: http://review.gluster.org/9854 Tested-by: NetBSD Build System Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra Talur <rtalur@redhat.com>