From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sagi Grimberg Subject: Re: [PATCH 7/9] IB/core: generic RDMA READ/WRITE API Date: Tue, 1 Mar 2016 11:00:11 +0200 Message-ID: <56D55A1B.6030902@dev.mellanox.co.il> References: <1456784410-20166-1-git-send-email-hch@lst.de> <1456784410-20166-8-git-send-email-hch@lst.de> <56D4C615.5010202@opengridcomputing.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <56D4C615.5010202@opengridcomputing.com> Sender: target-devel-owner@vger.kernel.org To: Steve Wise , Christoph Hellwig , linux-rdma@vger.kernel.org Cc: sagig@mellanox.com, bart.vanassche@sandisk.com, target-devel@vger.kernel.org List-Id: linux-rdma@vger.kernel.org >> + if (rdma_rw_use_mr(qp->device, port_num)) { >> + ret = rdma_rw_init_mr_wrs(ctx, qp, port_num, sg, sg_offset, >> + remote_addr, rkey, dir); > > At some point I would like the iWARP IO to do no-mr for WRITE/dma_nents > == 1, and WRITE/dma_nents <= max_send_sge for the device. I think this > will help smaller iSER/NVMEF READ IOPs. I'm testing this out now on the > NVMEF code, which is slightly different. If it proves out to better the > performance, I'll post a follow-on patch... Is this possible given that pd->local_dma_lkey has only local permissions?