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

[Nicolas Dichtel <nicolas.dichtel-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>]

Le 12/12/2014 14:20, Gonzalez Monroy, Sergio a écrit :
>> 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 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.
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=816997d03bca9fabcee65f3481eb0297103eceb7
>
> Solved in:
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/iommu/intel-iommu.c?id=1196c2fb0407683c2df92d3d09f9144d42830894
I think it's a very useful info.


Thank you,
Nicolas