* [PATCH] drm/amdgpu: Avoid extra evict-restore process.
@ 2025-07-09 20:31 Gang Ba
2025-07-09 20:31 ` [PATCH v2] " Gang Ba
0 siblings, 1 reply; 2+ messages in thread
From: Gang Ba @ 2025-07-09 20:31 UTC (permalink / raw)
To: amd-gfx; +Cc: Philip.Yang
If vm belongs to another process, this is fclose after fork,
wait may enable signaling KFD eviction fence and cause parent process queue evicted.
Signed-off-by: Gang Ba <Gang.Ba@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index f042372d9f2e..8ee1b7e62dee 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2410,6 +2410,13 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
*/
long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout)
{
+ /* If vm belongs to another process, this is fclose after fork,
+ * wait may enable signaling KFD eviction fence and cause parent process queue evicted.
+ */
+ if (vm->task_info->tgid &&
+ vm->task_info->tgid != current->group_leader->pid)
+ return 0;
+
timeout = dma_resv_wait_timeout(vm->root.bo->tbo.base.resv,
DMA_RESV_USAGE_BOOKKEEP,
true, timeout);
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* [PATCH v2] drm/amdgpu: Avoid extra evict-restore process.
2025-07-09 20:31 [PATCH] drm/amdgpu: Avoid extra evict-restore process Gang Ba
@ 2025-07-09 20:31 ` Gang Ba
0 siblings, 0 replies; 2+ messages in thread
From: Gang Ba @ 2025-07-09 20:31 UTC (permalink / raw)
To: amd-gfx; +Cc: Philip.Yang
If vm belongs to another process, this is fclose after fork,
wait may enable signaling KFD eviction fence and cause parent process queue evicted.
Signed-off-by: Gang Ba <Gang.Ba@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index f042372d9f2e..01e4f3ec22e9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2410,6 +2410,13 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
*/
long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout)
{
+ /* If vm belongs to another process, this is fclose after fork,
+ * wait may enable signaling KFD eviction fence and cause parent process queue evicted.
+ */
+ if (vm->is_compute_context &&
+ vm->task_info->tgid != current->group_leader->pid)
+ return 0;
+
timeout = dma_resv_wait_timeout(vm->root.bo->tbo.base.resv,
DMA_RESV_USAGE_BOOKKEEP,
true, timeout);
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2025-07-09 20:32 UTC | newest]
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2025-07-09 20:31 [PATCH] drm/amdgpu: Avoid extra evict-restore process Gang Ba
2025-07-09 20:31 ` [PATCH v2] " Gang Ba
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