From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH for-4.3] IB/ipoib: add module option for auto-creating mcast groups Date: Wed, 16 Sep 2015 11:03:23 -0600 Message-ID: <20150916170323.GB27294@obsidianresearch.com> References: <980e8b0a82042d7e5801e02bf16fe72a0bde6759.1441934465.git.dledford@redhat.com> <20150911182115.GA546@obsidianresearch.com> <55F32E7A.3020105@redhat.com> <55F86255.9080508@redhat.com> <20150915191159.GB24173@obsidianresearch.com> <55F988F1.8000508@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Christoph Lameter Cc: Doug Ledford , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Or Gerlitz List-Id: linux-rdma@vger.kernel.org On Wed, Sep 16, 2015 at 10:59:50AM -0500, Christoph Lameter wrote: > On Wed, 16 Sep 2015, Doug Ledford wrote: > > > > Abusing it for send-side is probably the wrong > > > direction overall. > > > > I wouldn't "abuse" it for such, I would suggest adding a proper notion > > of send-only registrations. > > That is really not necessary for IP traffic. There is no need to track > these since multicast can be send without subscriptions. So I guess that > there will not be much support on netdev for such an approach. InfiniBand is not unique here, eg, long ago proposals for IPoATM had the same problem. Not sure if there is any other more current networks that work this way.. 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