From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932331AbWFMVg4 (ORCPT ); Tue, 13 Jun 2006 17:36:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932334AbWFMVg4 (ORCPT ); Tue, 13 Jun 2006 17:36:56 -0400 Received: from mga03.intel.com ([143.182.124.21]:16154 "EHLO azsmga101-1.ch.intel.com") by vger.kernel.org with ESMTP id S932330AbWFMVgz (ORCPT ); Tue, 13 Jun 2006 17:36:55 -0400 X-IronPort-AV: i="4.06,128,1149490800"; d="scan'208"; a="50489536:sNHT5828210143" From: "Sean Hefty" To: "'Steve Wise'" , "Tom Tucker" Cc: "Andrew Morton" , , , , Subject: RE: [openib-general] [PATCH v2 1/2] iWARP Connection Manager. Date: Tue, 13 Jun 2006 14:36:46 -0700 Message-ID: <000001c68f31$78910fe0$24268686@amr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcaPKPmRQdErfavST2O0Lxl4DK7WagAByVPg In-Reply-To: <1150230871.17394.68.camel@stevo-desktop> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 X-OriginalArrivalTime: 13 Jun 2006 21:36:46.0989 (UTC) FILETIME=[78D2D3D0:01C68F31] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >> Er...no. It will lose this event. Depending on the event...the carnage >> varies. We'll take a look at this. >> > >This behavior is consistent with the Infiniband CM (see >drivers/infiniband/core/cm.c function cm_recv_handler()). But I think >we should at least log an error because a lost event will usually stall >the rdma connection. I believe that there's a difference here. For the Infiniband CM, an allocation error behaves the same as if the received MAD were lost or dropped. Since MADs are unreliable anyway, it's not so much that an IB CM event gets lost, as it doesn't ever occur. A remote CM should retry the send, which hopefully allows the connection to make forward progress. - Sean