kernel errors with HMM enabled

kernel errors with HMM enabled

[StDenis, Tom]

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Hi Philip,

With your HMM patches enabled I'm seeing (attached) kernel errors while 
running piglit.  Are these known?  I see it all along 
amd-staging-drm-next until I roll back before your very first HMM patches.

Tom

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Re: kernel errors with HMM enabled

[Alex Deucher]

Make sure you have this patch:
https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-5.2-wip&id=e811b0a799981eaa6fef1809278367471f14ba13

Alex

On Thu, Mar 14, 2019 at 12:36 PM StDenis, Tom <Tom.StDenis@amd.com> wrote:
>
> Hi Philip,
>
> With your HMM patches enabled I'm seeing (attached) kernel errors while
> running piglit.  Are these known?  I see it all along
> amd-staging-drm-next until I roll back before your very first HMM patches.
>
> Tom
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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Re: kernel errors with HMM enabled

[StDenis, Tom]

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).

Tom
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Re: kernel errors with HMM enabled

[Michel Dänzer]

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.


-- 
Earthling Michel Dänzer               |              https://www.amd.com
Libre software enthusiast             |             Mesa and X developer
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Re: 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.
> 
> 
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