Merge pull request #2099 from glotzerlab/fix-unified-memory-attr

Ensure that devices have full unified memory capabilities.

Author: joaander

CHANGELOG.rst

@@ -4,9 +4,17 @@ Change Log
 5.x
 ---
 
+5.3.1 (not yet released)
+^^^^^^^^^^^^^^^^^^^^^^^^
+
 5.3.0 (2025-06-26)
 ^^^^^^^^^^^^^^^^^^
 
+*Fixed*
+
+* Ensure that GPU devices have full unified memory capabilities
+  (`#2099 <https://github.com/glotzerlab/hoomd-blue/pull/2099>`__).
+
 *Added*
 
 * The Zetterling pair potential: ``hoomd.hpmc.pair.Zetterling``

hoomd/ExecutionConfiguration.cc

@@ -388,8 +388,9 @@ void ExecutionConfiguration::scanGPUs()
         // exclude a GPU when it doesn't support mapped memory
 #ifdef __HIP_PLATFORM_NVCC__
         int supports_managed_memory = 0;
-        cudaError_t cuda_error
-            = cudaDeviceGetAttribute(&supports_managed_memory, cudaDevAttrManagedMemory, dev);
+        cudaError_t cuda_error = cudaDeviceGetAttribute(&supports_managed_memory,
+                                                        cudaDevAttrPageableMemoryAccess,
+                                                        dev);
         if (cuda_error != cudaSuccess)
             {
             s_gpu_scan_messages.push_back("Failed to get device attribute: "