P4 to Git Change 1576208 by vsytchen@vsytchen-win10 on 2018/07/04 15:36:47

SWDEV-154903 - [Vega10][PAL] clSVMAlloc is failing to create allocations greater than 2GB

	1. Uncommit coarse grain SVM from system memory when calling clEnqueueSVMUnmap

	ReviewBoardURL = http://ocltc.amd.com/reviews/r/15336/diff/

Affected files ...

... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gpumemory.cpp#133 edit
... //depot/stg/opencl/drivers/opencl/runtime/device/pal/palmemory.cpp#22 edit
... //depot/stg/opencl/drivers/opencl/runtime/platform/memory.cpp#133 edit
... //depot/stg/opencl/drivers/opencl/runtime/platform/memory.hpp#106 edit

rocclr/runtime/device/gpu/gpumemory.cpp

@@ -411,6 +411,10 @@ Memory::~Memory() {
 
   // Release associated map target, if any
   if (NULL != mapMemory_) {
+    if (owner()->getSvmPtr() != nullptr) {
+      owner()->uncommitSvmMemory();
+    }
+
     mapMemory()->unmap(NULL);
     mapMemory_->release();
   }