Re: [PATCH 06/10] drm/ttm: move zombie handling into ttm_bo_evict

["Thomas Hellström" <thomas.hellstrom@linux.intel.com>]

On Fri, 2026-07-03 at 18:31 +0200, Natalie Vock wrote:
> From: Christian König <christian.koenig@amd.com>
> 
> Both callers do the same thing, so we can trivially unify that.
> 
> Signed-off-by: Christian König <christian.koenig@amd.com>
> Signed-off-by: Natalie Vock <natalie.vock@gmx.de>

Although might need a different definition of ttm_bo_is_zombie if we
keep the ttm refcount for now.

Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>


> ---
>  drivers/gpu/drm/ttm/ttm_bo.c | 24 +++++++++---------------
>  1 file changed, 9 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c
> b/drivers/gpu/drm/ttm/ttm_bo.c
> index 24c52df169ac8..54f01611ec823 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -359,6 +359,13 @@ static int ttm_bo_evict(struct ttm_buffer_object
> *bo,
>  	struct ttm_place hop;
>  	int ret = 0;
>  
> +	if (ttm_bo_is_zombie(bo)) {
> +		ret = ttm_bo_wait_ctx(bo, ctx);
> +		if (!ret)
> +			ttm_bo_cleanup_memtype_use(bo);
> +		return ret;
> +	}
> +
>  	memset(&hop, 0, sizeof(hop));
>  
>  	dma_resv_assert_held(bo->base.resv);
> @@ -466,13 +473,7 @@ int ttm_bo_evict_first(struct ttm_device *bdev,
> struct ttm_resource_manager *man
>  	if (!bo->resource || bo->resource->mem_type != mem_type)
>  		goto out_bo_moved;
>  
> -	if (ttm_bo_is_zombie(bo)) {
> -		ret = ttm_bo_wait_ctx(bo, ctx);
> -		if (!ret)
> -			ttm_bo_cleanup_memtype_use(bo);
> -	} else {
> -		ret = ttm_bo_evict(bo, ctx);
> -	}
> +	ret = ttm_bo_evict(bo, ctx);
>  out_bo_moved:
>  	dma_resv_unlock(bo->base.resv);
>  out_no_lock:
> @@ -520,14 +521,7 @@ static s64 ttm_bo_evict_cb(struct ttm_lru_walk
> *walk, struct ttm_buffer_object *
>  	if (bo->pin_count || !bo->bdev->funcs->eviction_valuable(bo,
> evict_walk->place))
>  		return 0;
>  
> -	if (ttm_bo_is_zombie(bo)) {
> -		lret = ttm_bo_wait_ctx(bo, walk->arg.ctx);
> -		if (!lret)
> -			ttm_bo_cleanup_memtype_use(bo);
> -	} else {
> -		lret = ttm_bo_evict(bo, walk->arg.ctx);
> -	}
> -
> +	lret = ttm_bo_evict(bo, walk->arg.ctx);
>  	if (lret)
>  		goto out;
>