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

[Christian König]

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.

Christian.