[Intel-xe] [PATCH v2 07/31] drm/xe: Only try to lock external BOs in VM bind

[Rodrigo Vivi]

On Mon, May 01, 2023 at 05:17:03PM -0700, Matthew Brost wrote:
> Not needed and causes some issues with bulk LRU moves.

I'm confused with this explanation and the code below.
could you please provide a bit more wording here?

> 
> Signed-off-by: Matthew Brost <mattthew.brost at intel.com>
> ---
>  drivers/gpu/drm/xe/xe_vm.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
> index 272f0f7f24fe..6c427ff92c44 100644
> --- a/drivers/gpu/drm/xe/xe_vm.c
> +++ b/drivers/gpu/drm/xe/xe_vm.c
> @@ -2064,9 +2064,11 @@ static int vm_bind_ioctl(struct xe_vm *vm, struct xe_vma *vma,
>  		 */
>  		xe_bo_get(vbo);
>  
> -		tv_bo.bo = &vbo->ttm;
> -		tv_bo.num_shared = 1;
> -		list_add(&tv_bo.head, &objs);
> +		if (!vbo->vm) {
> +			tv_bo.bo = &vbo->ttm;
> +			tv_bo.num_shared = 1;
> +			list_add(&tv_bo.head, &objs);
> +		}
>  	}
>  
>  again:
> -- 
> 2.34.1
>