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drm/ttm: Double check mem_type of BO while eviction 

BO might sit in a wrong lru list as there is a small period of memory
moving and lru list updating.

Lets skip eviction if we hit such mismatch.

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211110043149.57554-2-xinhui.pan@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
xinhui pan 2021-11-10 12:31:49 +08:00 committed by Christian König
parent f55aaf63bd
commit 7120a447c7
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/ttm/ttm_bo.c
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@ -617,7 +617,8 @@ static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo,
*busy = !ret;
}
if (ret && place && !bo->bdev->funcs->eviction_valuable(bo, place)) {
if (ret && place && (bo->resource->mem_type != place->mem_type ||
!bo->bdev->funcs->eviction_valuable(bo, place))) {
ret = false;
if (*locked) {
dma_resv_unlock(bo->base.resv);