From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH rdma-core 0/5] Common systemd/udev based boot support Date: Fri, 28 Jul 2017 09:58:42 -0600 Message-ID: <20170728155842.GC9646@obsidianresearch.com> References: <1500929067-1583-1-git-send-email-jgunthorpe@obsidianresearch.com> <00e601d30562$f5a7dff0$e0f79fd0$@opengridcomputing.com> <20170725164004.GA20959@obsidianresearch.com> <011601d30576$c3ac38c0$4b04aa40$@opengridcomputing.com> <20170725213354.GE10905@obsidianresearch.com> <016901d30590$3eee9910$bccbcb30$@opengridcomputing.com> <20170725220210.GA15663@obsidianresearch.com> <009901d30618$2d957e30$88c07a90$@opengridcomputing.com> <20170726162419.GC20499@obsidianresearch.com> <000d01d307a8$9cc0d660$d6428320$@opengridcomputing.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <000d01d307a8$9cc0d660$d6428320$@opengridcomputing.com> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Steve Wise Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, 'Doug Ledford' , 'Ram Amrani' , 'Ira Weiny' , 'Benjamin Drung' , 'Jarod Wilson' , Chien Tin Tung , mustafa.ismail-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org List-Id: linux-rdma@vger.kernel.org On Fri, Jul 28, 2017 at 08:51:28AM -0500, Steve Wise wrote: > Bringing down the NIC interfaces doesn't totally stop the adapter nor destroy > the queues needed for RDMA. It does bring the links down on the ethernet > interfaces though. So it behaves like I thought. I tested this by running an > rping, and while it was pushing rdma traffic, I did 'ifconfig ethX 0.0.0.0 down' > on the interface in use. The data flow stopped (and the iWARP/TCP stack started > retransmitting). I then brought the link back up, and after a few seconds the > rping traffic continued on. So, why defer creating queues until the first ifup? I can understand a nic driver that frees all memory when down (that is fairly common), but this arrangement seems really strange.. 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