linux-kernel - Re: [PATCH v1 20/20] drm/amdgpu: double AMDGPU_GTT_MAX_TRANSFER

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Message-ID: <a3afbacd-78e6-4fe2-9d52-5b05b4220133@amd.com>
Date: Tue, 4 Nov 2025 14:56:57 +0100
From: Christian König <christian.koenig@....com>
To: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
 Alex Deucher <alexander.deucher@....com>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 20/20] drm/amdgpu: double AMDGPU_GTT_MAX_TRANSFER_SIZE

On 11/4/25 09:35, Pierre-Eric Pelloux-Prayer wrote:
> Makes copies/evictions faster when gart windows are required.
> 
> Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>

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

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index b685bf207e43..82276eff511d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -38,7 +38,7 @@
>  #define AMDGPU_PL_MMIO_REMAP	(TTM_PL_PRIV + 5)
>  #define __AMDGPU_PL_NUM	(TTM_PL_PRIV + 6)
>  
> -#define AMDGPU_GTT_MAX_TRANSFER_SIZE	512
> +#define AMDGPU_GTT_MAX_TRANSFER_SIZE	1024
>  
>  extern const struct attribute_group amdgpu_vram_mgr_attr_group;
>  extern const struct attribute_group amdgpu_gtt_mgr_attr_group;