[PATCH] drm/amdgpu: increase reserved VRAM size to 8MB

[Christian König]

Am 25.11.20 um 14:12 schrieb Likun Gao:
> From: Likun Gao <Likun.Gao at amd.com>
>
> 4MB reserved VRAM size which used for page tables was not enough for
> some condition, increase it to 8MB to reduce page table contention.

What's the use case here? 8MB is already pretty extensive, I don't want 
to run into problems with APUs.

> Signed-off-by: Likun Gao <Likun.Gao at amd.com>
> Change-Id: Ibbc0c14a75bd0e57d77e30b7140a144f4030114a

Reviewed-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> index fa7d181934e5..1ed130d518a0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> @@ -104,7 +104,7 @@ struct amdgpu_bo_list_entry;
>   #define AMDGPU_VM_FAULT_STOP_ALWAYS	2
>   
>   /* Reserve 4MB VRAM for page tables */
> -#define AMDGPU_VM_RESERVED_VRAM		(4ULL << 20)
> +#define AMDGPU_VM_RESERVED_VRAM		(8ULL << 20)
>   
>   /* max number of VMHUB */
>   #define AMDGPU_MAX_VMHUBS			3