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SubjectRe: AMD IOMMU causing filesystem corruption
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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.

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