Re: AMD IOMMU causing filesystem corruption

[Samuel Sieb]

On 04/26/2017 03:14 AM, Joerg Roedel wrote:
> On Tue, Apr 25, 2017 at 10:55:24AM -0700, Samuel Sieb wrote:
> > On 04/07/2017 03:27 AM, Joerg Roedel wrote:
> > > Also, please try the attached debug-diff on your kernel. It completly
> > > disables the use of ATS in the amd-iommu driver.
> > I applied this patch to 4.11.0 rc8 and then stress tested the laptop
> > with another kernel build while running graphical applications and
> > there appears to be no damage to the filesystem.  Is there any way
> > to determine if ATS is enabled or disabled?
>
> Great, thanks for testing the patch. The lspci tool should be able to
> tell you whether the ATS capability is enabled on the GPU. With a
> 'lspci -vvv -s <GPUDEV>" should give you that info.
This test was done with the patch that always disables ATS.  Which is 
the current patch to selectively disable it?  The last patch I tried 
didn't seem to work.