Re: [dpdk-dev] I have a problem in setting up DPDK 2.1.0 in Fedora OS release 20 (Heisenbug). I cannot r

[최익성 <pnk003@naver.com>]

  
Dear John Manamara and DPDK experts.
 
Thank you very much for your precious advice and answer.
 
I will try to upgrade the OS.
 
I really appreciate to you for your excellent work and great contributions.
 
Sincerely Yours,
 
Ick-Sung Choi.

-----Original Message-----
From: "Mcnamara, John"<john.mcnamara@intel.com> 
To: "???"<pnk003@naver.com>; "De Lara Guarch, Pablo"<pablo.de.lara.guarch@intel.com>; "dev@dpdk.org"<dev@dpdk.org>; 
Cc: 
Sent: 2015-10-15 (목) 17:10:48
Subject: RE: [dpdk-dev] I have a problem in setting up DPDK 2.1.0 in Fedora OS release 20 (Heisenbug). I cannot r
 
> -----Original Message-----

> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of ???

> Sent: Thursday, October 15, 2015 2:02 AM

> To: De Lara Guarch, Pablo; dev@dpdk.org

> Subject: Re: [dpdk-dev] I have a problem in setting up DPDK 2.1.0 in

> Fedora OS release 20 (Heisenbug). I cannot r

>

> I checked what you mentioned.

> 

> * Fedora Linux kernel version is as follows.

> 

>      $ uname -r (print kernel name)

>      3.17.7-200.fc20.x86_64



Hi,



This may be a known issue. See:





http://dpdk.org/doc/guides/rel_notes/known_issues.html#devices-bound-to-igb-uio-with-vt-d-enabled-do-not-work-on-linux-kernel-3-15-3-17





"Devices bound to igb_uio with VT-d enabled do not work on Linux kernel 3.15-3.17



Description:

    When VT-d is enabled (iommu=pt intel_iommu=on), devices are 1:1 mapped. In the Linux kernel unbinding devices from drivers removes that mapping which result in IOMMU errors. Introduced in Linux kernel 3.15 commit, solved in Linux kernel 3.18 commit."



John