Re: [dpdk-dev] [PATCH v2] doc: add known issue for iommu and igb_uio

["Gonzalez Monroy, Sergio" <sergio.gonzalez.monroy@intel.com>]

> From: Nicolas Dichtel [mailto:nicolas.dichtel@6wind.com]
> Sent: Friday, December 12, 2014 1:00 PM
> 
> Le 12/12/2014 13:06, Sergio Gonzalez Monroy a écrit :
> > 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 later kernels do solve the issue.

> > 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=816997d03bca9fabcee65f3481eb0297103eceb7

Solved in:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/iommu/intel-iommu.c?id=1196c2fb0407683c2df92d3d09f9144d42830894

> >
> > Signed-off-by: Sergio Gonzalez Monroy
> > <sergio.gonzalez.monroy@intel.com>
> > ---
> Please, also don't forget to explain what you have changed between the v1
> and v2.
> The history should be put here, after the '---', something like:
> 
> v2: update that
> 
I did forget. I will add it for v3.
I need to fix issue with patch not  showing in patchwork (I think cause of R (registered) symbol in context line).

Regards,
Sergio
> 
> Regards,
> Nicolas