ttm use pages don't need to populate?

ttm_tt_set_user has "ttm->state = tt_unbound" which will cause the following ttm_tt_populate return directly because of bellow check: if (ttm->state != tt_unpopulated) return 0; Does it mean we don't need to populate user pages? Here is the patch if it is not the case Tha

ttm use pages don't need to populate?

ttm_tt_set_user has "ttm->state = tt_unbound" which will cause the following ttm_tt_populate return directly because of bellow check: if (ttm->state != tt_unpopulated) return 0; Does it mean we don't need to populate user pages? Here is the patch if it is not the case Tha