kernel BUG at drivers/gpu/drm//ttm/ttm_bo.c:196!

[Michel Dänzer]

On 2019-02-07 10:58 a.m., Christian König wrote:
> Am 05.02.19 um 18:40 schrieb Michel Dänzer:
>> On 2019-02-05 4:45 p.m., Christian König wrote:
>>> Possible, but unlikely.
>>>
>>> That sounds more like a reference counting problem where something is
>>> killing the BO while it is still on the LRU.
>> FWIW, I've hit this twice now today, whereas I don't remember ever
>> hitting it before (not 100% sure though).
>>
>> I reverted the remaining hunk of the "cleanup setting bulk_movable"
>> change, and it survived a piglit run. Could just be luck, though...
> 
> Did you have KASAN enabled?

Yes, KASAN is enabled in my amd-staging-drm-next builds (as can be seen
in the dmesg excerpt).

FWIW, ~70 ms before this happened, the OOM killer was triggered from a
page fault. Maybe that's related?


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