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drm/amdgpu: skip clearing empty freed VM list on GEM close

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amdgpu_vm_clear_freed() allocates an amdgpu_sync object and walks the VM
reservation fences via amdgpu_sync_resv() before checking whether vm->freed
has anything to clear. Return early when the list is empty to skip this
overhead on a hot path (every GEM close and command submission).

Signed-off-by: Bob Zhou <bobzhou2@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 8ba869e852)
This commit is contained in:
Bob Zhou 2026-07-16 10:44:36 +08:00 committed by Alex Deucher
parent 17da841055
commit e3a721753f
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -1553,6 +1553,8 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
struct amdgpu_sync sync;
int r;
if (list_empty(&vm->freed))
return 0;
/*
* Implicitly sync to command submissions in the same VM before