[Intel-gfx] [PATCH 00/19] drm/i915: Short-term pinning and async eviction.

[Maarten Lankhorst]

Op 16-09-2021 om 11:40 schreef Thomas Hellström (Intel):
>
> On 8/30/21 2:09 PM, Maarten Lankhorst wrote:
>> Remove some parts of the i915_vma api, ensure obj->vma always exists,
>> and finally force the object lock to be taken when calling i915_vma_unbind
>> is called.
>
> Should this be vma->obj?
>
Correct, missed that.
>
>>
>> With this, locking is a lot cleaner, and we no longer need all the if (!obj->vma) checks.
>> We kill off the locking around i915_vma->set/get pages, and kill off the short-term
>> pinning/unpinning in execbuf.
>>
>> After this, we go 1 step further, populate obj->moving where required, and add support
>> for async eviction/clearing.
>
> Does the async eviction / clearing depend on the vma cleanup? If not can we move that into a separate series? 

It kind of does. We cannot always require vma->obj to be locked and remove vma locks if we don't have vma->obj all the time.