It doesn't make sense that freeing BO still uses per-vm resv.
I remember when BO is in release list, its resv will be from per-vm resv
copy. Could you check it?
-David
在 2019/7/10 17:29, Emily Deng 写道:
> For vulkan cts allocation test cases, they will create a series of bos, and then free
> them. As it has lots of alloction test cases with the same vm, as per vm
> bo feature enable, all of those bos' resv are the same. But the bo free is quite slow,
> as they use the same resv object, for every time, free a bo,
> it will check the resv whether signal, if it signal, then will free it. But
> as the test cases will continue to create bo, and the resv fence is increasing. So the
> free is more slower than creating. It will cause memory exhausting.
>
> Method:
> When the resv signal, release all the bos which are use the same
> resv object.
>
> Signed-off-by: Emily Deng <Emily.Deng@xxxxxxx>
> ---
> drivers/gpu/drm/ttm/ttm_bo.c | 29 ++++++++++++++++++++++++-----
> 1 file changed, 24 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index f9a3d4c..57ec59b 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -543,6 +543,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
> {
> struct ttm_bo_global *glob = bo->bdev->glob;
> struct reservation_object *resv;
> + struct ttm_buffer_object *resv_bo, *resv_bo_next;
> int ret;
>
> if (unlikely(list_empty(&bo->ddestroy)))
> @@ -566,10 +567,14 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
> interruptible,
> 30 * HZ);
>
> - if (lret < 0)
> + if (lret < 0) {
> + kref_put(&bo->list_kref, ttm_bo_release_list);
> return lret;
> - else if (lret == 0)
> + }
> + else if (lret == 0) {
> + kref_put(&bo->list_kref, ttm_bo_release_list);
> return -EBUSY;
> + }
>
> spin_lock(&glob->lru_lock);
> if (unlock_resv && !kcl_reservation_object_trylock(bo->resv)) {
> @@ -582,6 +587,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
> * here.
> */
> spin_unlock(&glob->lru_lock);
> + kref_put(&bo->list_kref, ttm_bo_release_list);
> return 0;
> }
> ret = 0;
> @@ -591,15 +597,29 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
> if (unlock_resv)
> kcl_reservation_object_unlock(bo->resv);
> spin_unlock(&glob->lru_lock);
> + kref_put(&bo->list_kref, ttm_bo_release_list);
> return ret;
> }
>
> ttm_bo_del_from_lru(bo);
> list_del_init(&bo->ddestroy);
> kref_put(&bo->list_kref, ttm_bo_ref_bug);
> -
> spin_unlock(&glob->lru_lock);
> ttm_bo_cleanup_memtype_use(bo);
> + kref_put(&bo->list_kref, ttm_bo_release_list);
> +
> + spin_lock(&glob->lru_lock);
> + list_for_each_entry_safe(resv_bo, resv_bo_next, &bo->bdev->ddestroy, ddestroy) {
> + if (resv_bo->resv == bo->resv) {
> + ttm_bo_del_from_lru(resv_bo);
> + list_del_init(&resv_bo->ddestroy);
> + spin_unlock(&glob->lru_lock);
> + ttm_bo_cleanup_memtype_use(resv_bo);
> + kref_put(&resv_bo->list_kref, ttm_bo_release_list);
> + spin_lock(&glob->lru_lock);
> + }
> + }
> + spin_unlock(&glob->lru_lock);
>
> if (unlock_resv)
> kcl_reservation_object_unlock(bo->resv);
> @@ -639,9 +659,8 @@ static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
> ttm_bo_cleanup_refs(bo, false, !remove_all, true);
> } else {
> spin_unlock(&glob->lru_lock);
> + kref_put(&bo->list_kref, ttm_bo_release_list);
> }
> -
> - kref_put(&bo->list_kref, ttm_bo_release_list);
> spin_lock(&glob->lru_lock);
> }
> list_splice_tail(&removed, &bdev->ddestroy);
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