[PATCH] drm/ttm: stop always moving BOs on the LRU on page fault

[Michel Dänzer]

On 2019-01-11 8:12 p.m., Christian König wrote:
> Am 11.01.19 um 15:17 schrieb Michel Dänzer:
>> On 2019-01-11 2:15 p.m., Christian König wrote:
>>> Move the BO on the LRU only when it is actually moved by a DMA
>>> operation.
>>>
>>> [...]
>>>
>>> @@ -177,6 +175,13 @@ static vm_fault_t ttm_bo_vm_fault(struct
>>> vm_fault *vmf)
>>>               ret = VM_FAULT_SIGBUS;
>>>               goto out_unlock;
>>>           }
>>> +
>>> +        if (bo->moving != moving) {
>> Hmm, could a driver just update the existing fence instead of attaching
>> a new one?
> 
> Mhm, not as far as I know. That would violate similar checks elsewhere.

Makes sense, my R-b stands.


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