From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Steve Wise" Subject: RE: [PATCH RFC 2/2] RDMA/nldev: provide detailed CM_ID information Date: Mon, 5 Feb 2018 14:28:02 -0600 Message-ID: <026201d39ebf$d1f087a0$75d196e0$@opengridcomputing.com> References: <531889e6a24f7919dec71734c91298d266aa9721.1517418595.git.swise@opengridcomputing.com> <20180201084944.GH2055@mtr-leonro.local> <00ce01d39b76$bd374ac0$37a5e040$@opengridcomputing.com> <20180204150553.GH27780@mtr-leonro.local> <015301d39e96$9f5e0b60$de1a2220$@opengridcomputing.com> <20180205200020.GH11446@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180205200020.GH11446-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Content-Language: en-us Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: 'Jason Gunthorpe' Cc: 'Leon Romanovsky' , dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org > On Mon, Feb 05, 2018 at 09:33:07AM -0600, Steve Wise wrote: > > > Perhaps we add a device-unique (or globally unique) identifier as part of > > the restrack struct and use that for GET/SET? > > What use is an ID if the user can't associate that with something > meaningful? It uniquely identifies the widget you want to GET or SET. Ideally, having it be something meaningful is nice, but if we want to support GET/SET on various single objects, we need identifiers. And assigning them as part of restrack would do the trick. However, I don't see GET/SET being useful for QP, CQ, PD, CM_ID, nor MR resources. Just DUMP. I do see perhaps devices and links having GET/SET. For instance setting up stuff for RXE and SIW soft devices. > > For userspace, a tuple of the filehandle and existing the per-file > handle # would make some sense as a unique ID, but userspace is going > to have a pointer not necessarily the handle number :( > I'm not following you here. Who does filehandle/handle# pertain to rdmatool fetching objects via netlnk and possibly setting them? Steve. -- 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