From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Heinz Subject: RE: user SA notifications, redux Date: Thu, 14 Oct 2010 10:04:25 -0500 Message-ID: <4C2744E8AD2982428C5BFE523DF8CDCB49D45E3FE3@MNEXMB1.qlogic.org> References: <4C2744E8AD2982428C5BFE523DF8CDCB49D45E3EE4@MNEXMB1.qlogic.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: Content-Language: en-US Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "Hefty, Sean" , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "ewg-G2znmakfqn7U1rindQTSdQ@public.gmane.org" Cc: "vlad-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org" , Roland Dreier List-Id: linux-rdma@vger.kernel.org By providing this mechanism, ib_usa provides a convenient and useful way for user applications to detect when nodes enter or leave the fabric. This is useful for fabric monitoring applications (like a system admin dashboard) or, conceivably, to allow a job scheduler to react to problems and to dynamically balance the computational load across the fabric. As a reminder - the original proposal also supported allowing user applications to join multicast groups, but there was talk about adding that to rdma_cm, instead. -----Original Message----- From: Hefty, Sean [mailto:sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org] Sent: Wednesday, October 13, 2010 11:59 AM To: Mike Heinz; linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; ewg-G2znmakfqn7U1rindQTSdQ@public.gmane.org Cc: vlad-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org; Roland Dreier Subject: RE: user SA notifications, redux > As I mentioned earlier, the reason ib_sa acts as a single access point for > SA/SM traps and notices is because traps and notices are sent to ports, not > to > queue pairs and not to processes. That means only one entity can be > subscribed > for notices and traps at any particular time, and must manage them, > "sharing > them out" among all processes that are interested in them. Can you provide a brief description of the intended usage model? -- 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