From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH V4 for-next 1/5] IB/core: Add RSS and TSS QP groups - suggesting BOF during OFA conf to further discuss that Date: Thu, 25 Apr 2013 14:12:55 -0600 Message-ID: <20130425201255.GB31863@obsidianresearch.com> References: <1828884A29C6694DAF28B7E6B8A823736FD1E64F@ORSMSX109.amr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1828884A29C6694DAF28B7E6B8A823736FD1E64F-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "Hefty, Sean" Cc: Or Gerlitz , Tzahi Oved , Roland Dreier , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "shlomop-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org \"Shlomo Pongratz\"" , Christoph Lameter List-Id: linux-rdma@vger.kernel.org On Wed, Apr 24, 2013 at 02:24:45AM +0000, Hefty, Sean wrote: > Conceptually, RSS/TSS are a set of send/receive work queues all > belonging to the same transport level address. There's no > parent-child relationship or needed pairing of send and receive > queues together in order to form a group. This view makes sense to me as well. Can someone also confirm that using TSS doesn't affect the on-the-wire packets vs the non-TSS cases? I heard a few comments that sounded like TSS users get a per-queue QPN in the outgoing packet rather than a single QPN for the group, which would be pretty ugly. IMHO, this sort of stuff needs to have a very well defined on-the-wire behaviour, even if it is just documented in the ibverbs man pages. > Personally, I'd like to see a way that better captures the notion of > a 'set of work queues with the same address'. For example, it makes > more sense to me if a user created/destroyed the work queues > together, and if the WQs were viewed as being in a single state > (INIT, RTR, RTS...). Yah, an API that made work queues a sub object of the QP seems to make much more sense than trying to manage an array of QPs. 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