1 files changed, 5 insertions, 0 deletions
diff --git a/Graphics/GraphicsEngineVulkan/include/FenceVkImpl.h b/Graphics/GraphicsEngineVulkan/include/FenceVkImpl.h
index 7004d92e..894451e6 100644
--- a/Graphics/GraphicsEngineVulkan/include/FenceVkImpl.h
+++ b/Graphics/GraphicsEngineVulkan/include/FenceVkImpl.h
@@ -49,6 +49,11 @@ public:
                 bool                IsDeviceInternal = false);
     ~FenceVkImpl();
 
+    // Note that this method is not thread-safe. The reason is that VulkanFencePool is not thread
+    // safe, and DeviceContextVkImpl::SignalFence() adds the fence to the pending fences list that
+    // are signalled later by the command context when it submits the command list. So there is no
+    // guarantee that the fence pool is not accessed simultaneously by multiple threads even if the
+    // fence object itself is protected by mutex.
     virtual Uint64 GetCompletedValue()override final;
 
     /// Resets the fence to the specified value.