[PATCH] drm/amdkfd: Fix dmabuf's redundant eviction when unmapping

[Eric Huang]

dmabuf is allocated/mapped as GTT domain, when dma-unmapping dmabuf
changing placement to CPU will trigger memory eviction after calling
ttm_bo_validate, and the eviction will cause performance drop.
Keeping the correct domain will solve the issue.

Signed-off-by: Eric Huang <jinhuieric.huang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index a3b09edfd1bf..17b708acb447 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -642,7 +642,7 @@ kfd_mem_dmaunmap_dmabuf(struct kfd_mem_attachment *attachment)
 	struct ttm_operation_ctx ctx = {.interruptible = true};
 	struct amdgpu_bo *bo = attachment->bo_va->base.bo;
 
-	amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
+	amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
 	ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 }
 
-- 
2.34.1