From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH v3 03/13] Attach/detach SoftiWarp to/from network and RDMA subsystem Date: Tue, 23 Jan 2018 10:47:58 -0700 Message-ID: <20180123174758.GH30670@ziepe.ca> References: <20180114223603.19961-1-bmt@zurich.ibm.com> <20180114223603.19961-4-bmt@zurich.ibm.com> <00ff01d39467$f1f31b60$d5d95220$@opengridcomputing.com> <20180123164316.GC30670@ziepe.ca> <011801d3946b$53ef0060$fbcd0120$@opengridcomputing.com> <20180123170517.GE30670@ziepe.ca> <013a01d3946f$034683f0$09d38bd0$@opengridcomputing.com> <20180123172830.GF30670@ziepe.ca> <014501d39471$84cdee20$8e69ca60$@opengridcomputing.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <014501d39471$84cdee20$8e69ca60$@opengridcomputing.com> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Steve Wise Cc: 'Bernard Metzler' , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On Tue, Jan 23, 2018 at 11:42:20AM -0600, Steve Wise wrote: > Since the iwarp protocols run on top of TCP/IP, there is always the case > that some middle box resegments tcp segments differently, so a good iwarp HW > implementation should deal with funny alignments, partial iWARP PDUs > arriving, etc. But the RFCs, as I read them, want implementations to try > "really hard" to avoid spanning an iWARP PDU across many TCP segments. And > I think siw should do the same, by default. But Bernard just said siw doesn't interoperate in certain cases because of this - so that sounds like more than 'try really hard' ?? Or is that an overstatement and it just makes the rx side slower if segmentation is not optimal? 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