[PATCH 1/2] drm/amdgpu: disable the VRAM manager on special placements v2

[deathsimple@xxxxxxxxxxx (Christian König)]

Am 04.11.2016 um 12:00 schrieb Christian König:
> From: Christian König <christian.koenig at amd.com>
>
> This disables the VRAM manager when a special placement is requested, otherwise
> we play ping/pong with the buffers on every command submission.
>
> v2: only check lpfn
>
> Signed-off-by: Christian König <christian.koenig at amd.com>

Could anybody give a Reviewed-by for this? I think that is a rather 
important performance bug fix.

Regards,
Christian.

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> index 180eed7c..d710226 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> @@ -108,7 +108,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
>   		lpfn = man->size;
>   
>   	if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS ||
> -	    amdgpu_vram_page_split == -1) {
> +	    place->lpfn || amdgpu_vram_page_split == -1) {
>   		pages_per_node = ~0ul;
>   		num_nodes = 1;
>   	} else {