Merge pull request eclipse-openj9#21348 from amicic/offheap_enabled

Enable offheap on X, P and A

Author: pshipton

runtime/gc_vlhgc/ConfigurationIncrementalGenerational.cpp

@@ -99,8 +99,10 @@ MM_ConfigurationIncrementalGenerational::createHeapWithManager(MM_EnvironmentBas
 		return NULL;
 	}
 #if defined(J9VM_GC_SPARSE_HEAP_ALLOCATION)
-	/* set off-heap disabled as default for balanced GC */
-	extensions->isVirtualLargeObjectHeapEnabled = false;
+#if defined(J9HAMMER) || defined(PPC64) || defined(AARCH64)
+	/* Set off-heap enabled as default for balanced GC */
+	extensions->isVirtualLargeObjectHeapEnabled = true;
+ #endif /* defined(J9HAMMER) || defined(PPC64) || defined(AARCH64) */
 
 	if (extensions->virtualLargeObjectHeap._wasSpecified) {
 		extensions->isVirtualLargeObjectHeapEnabled = extensions->virtualLargeObjectHeap._valueSpecified;