kernel errors with HMM enabled

[Yang, Philip]

Hi Tom,

Yes, we are missing some HMM fixes/changes from 5.1, but the crash log 
seems not related to those fixes/changes in 5.1.

I did see the similar crash log in __mmu_notifier_release path that 
should be fixed by the patch "use reference counting for HMM struct" as 
Alex mentioned. Since you have applied that patch, this could be another 
new issue.

May you provide steps how to reproduce the issue while running piglit?

Regards,
Philip

On 2019-03-14 1:18 p.m., Michel Dänzer wrote:
> On 2019-03-14 6:10 p.m., StDenis, Tom wrote:
>> On 2019-03-14 12:37 p.m., Alex Deucher wrote:
>>> Make sure you have this patch:
>>> https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-5.2-wip&id=e811b0a799981eaa6fef1809278367471f14ba13
>>
>> Hi Alex,
>>
>> The tip of our amd-staging-drm-next includes this patch (about 126 down
>> from the tip).
> 
> amd-staging-drm-next might be missing more HMM fixes from 5.1, probably
> better to wait until we've rebased on that before spending too much more
> effort on this.
> 
>