From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicolas Dichtel Subject: Re: [PATCH v2] doc: add known issue for iommu and igb_uio Date: Fri, 12 Dec 2014 14:28:19 +0100 Message-ID: <548AED73.3030804@6wind.com> References: <1418380884-6875-1-git-send-email-sergio.gonzalez.monroy@intel.com> <1418385971-17323-1-git-send-email-sergio.gonzalez.monroy@intel.com> <548AE6BC.7060202@6wind.com> <91383E96CE459D47BCE92EFBF5CE73B004EFED22@IRSMSX108.ger.corp.intel.com> Reply-To: nicolas.dichtel-pdR9zngts4EAvxtiuMwx3w@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable To: "Gonzalez Monroy, Sergio" , "dev-VfR2kkLFssw@public.gmane.org" Return-path: In-Reply-To: <91383E96CE459D47BCE92EFBF5CE73B004EFED22-kPTMFJFq+rEMvF1YICWikbfspsVTdybXVpNB7YpNyf8@public.gmane.org> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" Le 12/12/2014 14:20, Gonzalez Monroy, Sergio a =C3=A9crit : >> From: Nicolas Dichtel [mailto:nicolas.dichtel-pdR9zngts4EAvxtiuMwx3w@public.gmane.org] >> Sent: Friday, December 12, 2014 1:00 PM >> >> Le 12/12/2014 13:06, Sergio Gonzalez Monroy a =C3=A9crit : >>> Known issue regarding iommu/VT-d and igb_uio on Linux kernel version >>> 3.15 to 3.17 where unbinding the device from the driver removes the >>> 1:1 >> Do you mean that the problem doesn't exist with a linux 3.18? >> > Yes, as it is mentioned in the resolution/workarounds, earlier or late= r kernels do solve the issue. Ok, I was not sure that the last version was tested ;-) > >>> mapping for the device on the iommu resulting in memory access errors= . >> Do you have the linux commit id which introduces the problem? And the = one >> which solves it? >> > I do have the commits, but I was not sure if I should add the info (at = least no previous release note did). > > Introduced in: > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/= drivers/iommu/intel-iommu.c?id=3D816997d03bca9fabcee65f3481eb0297103eceb7 > > Solved in: > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/= drivers/iommu/intel-iommu.c?id=3D1196c2fb0407683c2df92d3d09f9144d42830894 I think it's a very useful info. Thank you, Nicolas