From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH RFC 2/2] RDMA/isert: Support iWARP transport Date: Thu, 25 Jun 2015 13:12:20 -0600 Message-ID: <20150625191220.GA15726@obsidianresearch.com> References: <20150625153754.13272.432.stgit@build.ogc.int> <20150625153922.13272.41789.stgit@build.ogc.int> <20150625182505.GA15337@obsidianresearch.com> <1828884A29C6694DAF28B7E6B8A82373A8FF9D60@ORSMSX109.amr.corp.intel.com> <005a01d0af75$70c9eb60$525dc220$@opengridcomputing.com> <1828884A29C6694DAF28B7E6B8A82373A8FF9D96@ORSMSX109.amr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1828884A29C6694DAF28B7E6B8A82373A8FF9D96-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "Hefty, Sean" Cc: Steve Wise , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org" , "orgerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org" , Roi Dayan List-Id: linux-rdma@vger.kernel.org On Thu, Jun 25, 2015 at 06:45:56PM +0000, Hefty, Sean wrote: > > How would you envision doing this? At the time a MR is registered the > > device driver doesn't know if the application will be doing > > RDMA reads or not on that MR. > > I was thinking of checking for REMOTE_READ, but that doesn't work on the initiator side. > > I guess you could a READ_DEST(SOURCE? TARGET?) flag to indicate that > the MR will be used on the initiating side of the RDMA read > operation. Yes, that does make more sense... What about moving to something more specific? Encode the allowed verbs in the access flag? I don't understand why iWarp HW choose to ignore the verbs spec and not use IB_ACCESS_LOCAL_WRITE to cover RDMA READ responses... Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html