From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: AW: AW: AW: IPoIB GRO Date: Tue, 5 Nov 2013 10:24:31 -0700 Message-ID: <20131105172431.GA14706@obsidianresearch.com> References: <12EF8D94C6F8734FB2FF37B9FBEDD173585A3E3B@EXCHANGE.collogia.de> <527759C6.3070009@dev.mellanox.co.il> <12EF8D94C6F8734FB2FF37B9FBEDD173585A4301@EXCHANGE.collogia.de> <52779612.9020103@dev.mellanox.co.il> <12EF8D94C6F8734FB2FF37B9FBEDD173585A45CF@EXCHANGE.collogia.de> <5278A757.2070406@mellanox.com> <12EF8D94C6F8734FB2FF37B9FBEDD173585A4B3D@EXCHANGE.collogia.de> <5278B0CA.9080305@dev.mellanox.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <5278B0CA.9080305-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Erez Shitrit Cc: Markus Stockhausen , Or Gerlitz , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Wendy Cheng List-Id: linux-rdma@vger.kernel.org On Tue, Nov 05, 2013 at 10:48:10AM +0200, Erez Shitrit wrote: > so, to summarize: > The HW does the work (truncates the big ip packet to series of ip > packets, each with the relevant mtu size and increases the ip-id for > each) > The FW enables that work on the HW > the FW in A0 card doesn't enable that option for the HW. Sounds like this bug causes a performance regression, and it sounds like it puts incorrect packets on the wire. This should be patched, have the driver disable TSO for cards that can't support it... 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