From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH rdma-rc 0/4] Remove mlx5 support for IB_DEVICE_LOCAL_DMA_LKEY Date: Mon, 21 Sep 2015 10:41:27 -0600 Message-ID: <20150921164127.GD3993@obsidianresearch.com> References: <1442742767-8755-1-git-send-email-sagig@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1442742767-8755-1-git-send-email-sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Sagi Grimberg Cc: Doug Ledford , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Chuck Lever , Eli Cohen List-Id: linux-rdma@vger.kernel.org On Sun, Sep 20, 2015 at 12:52:43PM +0300, Sagi Grimberg wrote: > The Connect-IB device has a specific issue with memory registration using > the reserved lkey (device global_dma_lkey). This caused user-space memory > registration which usually uses cached pre-registered memory keys to fail > due to a device access error during registration. kernel-space memory > registrations used an internal instance a physical memory key allocated with > the private pd context, so this error didn't happen there. I didn't read in super detail, but this all looks very sane to me. Reviewed-By: Jason Gunthorpe 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