From mboxrd@z Thu Jan 1 00:00:00 1970 From: Or Gerlitz Subject: if/how to dictate IB device name per PCI BDF Date: Thu, 11 Oct 2012 13:02:45 +0200 Message-ID: <5076A755.30605@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Roland Dreier Cc: "linux-rdma (linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org)" , Shlomo Pongratz , Eli Cohen List-Id: linux-rdma@vger.kernel.org Hi Roland, We got a report that on a system with multiple (say two) ConnectX HCAs, its possible for the order of device probing to be different across simple reboots, that is sometimes the device with PCI BDF X is probed 1st and gets to be IB device mlx4_0 and some other-timesthe device with BDF Y gets to be mlx4_0 and X becomes mlx4_1, and so on, which for some reason creates a hassle for them. I don't fully understand how the PCI scan order can change between different reboots, but have the feeling its possible (in black box manner, the reports claims that). Thinking about this a bit, will it be possible to provide a udev rulethat can dictate to the IB core what name / suffix digit to assign for a device with certain BDF? Or. -- 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