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drm/amdgpu: immediately use GTT for new allocations

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commit a755906fb2b8370c43e91ba437ae1b3e228e8b02 upstream.

Only use GTT as a fallback if we already have a backing store. This
prevents evictions when an application constantly allocates and frees new
memory.

Partially fixes
https://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2833985.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 216c1282dd ("drm/amdgpu: use GTT only as fallback for VRAM|GTT")
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian König
2025-03-20 14:46:18 +01:00
committed by Greg Kroah-Hartman
parent 4b171d4cbf
commit a53d959fe6
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
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@@ -161,8 +161,8 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
* When GTT is just an alternative to VRAM make sure that we
* only use it as fallback and still try to fill up VRAM first.
*/
if (domain & abo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM &&
!(adev->flags & AMD_IS_APU))
if (abo->tbo.resource && !(adev->flags & AMD_IS_APU) &&
domain & abo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM)
places[c].flags |= TTM_PL_FLAG_FALLBACK;
c++;
}