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From: Chen, Xiaogang <[email protected]>
Sent: Friday, May 23, 2025 6:27 AM
To: Deng, Emily <[email protected]>; [email protected]
Subject: Re: [PATCH v2] drm/ttm: Should to return the evict error



On 5/21/2025 9:42 PM, Deng, Emily wrote:

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[AMD Official Use Only - AMD Internal Distribution Only]



Ping......



Emily Deng

Best Wishes







-----Original Message-----

From: Emily Deng <[email protected]><mailto:[email protected]>

Sent: Wednesday, May 21, 2025 11:57 AM

To: [email protected]<mailto:[email protected]>

Cc: Deng, Emily <[email protected]><mailto:[email protected]>

Subject: [PATCH v2] drm/ttm: Should to return the evict error



For the evict fail case, the evict error should be returned.



v2: Consider ENOENT case.



Signed-off-by: Emily Deng <[email protected]><mailto:[email protected]>

---

drivers/gpu/drm/ttm/ttm_resource.c | 8 ++++----

1 file changed, 4 insertions(+), 4 deletions(-)



diff --git a/drivers/gpu/drm/ttm/ttm_resource.c 
b/drivers/gpu/drm/ttm/ttm_resource.c

index 097716bd248a..abf104ae9d35 100644

--- a/drivers/gpu/drm/ttm/ttm_resource.c

+++ b/drivers/gpu/drm/ttm/ttm_resource.c

@@ -511,12 +511,12 @@ int ttm_resource_manager_evict_all(struct ttm_device

*bdev,

              .force_alloc = true

      };

      struct dma_fence *fence;

-      int ret;

+      int ret, evict_ret = 0;



      do {

-              ret = ttm_bo_evict_first(bdev, man, &ctx);

+              evict_ret = ttm_bo_evict_first(bdev, man, &ctx);

              cond_resched();

-      } while (!ret);

+      } while (!evict_ret);



      spin_lock(&man->move_lock);

      fence = dma_fence_get(man->move);

@@ -529,7 +529,7 @@ int ttm_resource_manager_evict_all(struct ttm_device *bdev,

                      return ret;

      }



-      return 0;

+      return (evict_ret == -ENOENT) ? 0 : evict_ret;

}

Can you explain why you care ENOENT(No such file or directory) specifically?

Regards

Xiaogang

For ENOENT, it simply means the resource or file doesn't exist—it doesn't 
indicate an error during eviction. We only need to focus on actual 
eviction-related errors.

Emily Deng
Best Wishes






EXPORT_SYMBOL(ttm_resource_manager_evict_all);



--

2.34.1


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