From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH V6 9/9] isert: Support iWARP transports using FRMRs Date: Mon, 27 Jul 2015 11:07:46 -0600 Message-ID: <20150727170746.GB18348@obsidianresearch.com> References: <20150724161331.25617.8475.stgit@build2.ogc.int> <20150724161904.25617.85015.stgit@build2.ogc.int> <20150724165721.GC25480@obsidianresearch.com> <00ce01d0c641$493ea300$dbbbe900$@opengridcomputing.com> <20150724192411.GC26225@obsidianresearch.com> <55B4B510.8050106@dev.mellanox.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <55B4B510.8050106@dev.mellanox.co.il> Sender: target-devel-owner@vger.kernel.org To: Sagi Grimberg Cc: Steve Wise , dledford@redhat.com, infinipath@intel.com, sagig@mellanox.com, ogerlitz@mellanox.com, roid@mellanox.com, linux-rdma@vger.kernel.org, eli@mellanox.com, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, bfields@fieldses.org List-Id: linux-rdma@vger.kernel.org On Sun, Jul 26, 2015 at 01:23:12PM +0300, Sagi Grimberg wrote: > Question though, wouldn't it be better to do a single RDMA_READ to say > 4 registered keys rather than RDMA_READ_WITH_INV for each? RDMA READ is limted to 1 sg in iWarp. RDMA_READ_WITH_INV and 1 sg is really the only correct way to drive iWarp. Jason