src/gpu/hsail/vm/gpu_hsail_Tlab.hpp

*** 136,145 ****
--- 136,148 ----
  
        // extract the necessary tlab fields into a TlabInfo record
        HSAILTlabInfo* pTlabInfo = &_tlab_infos_pool_start[i];
        _cur_tlab_infos[i] = pTlabInfo;
        pTlabInfo->initialize(tlab->start(), tlab->top(), tlab->end(), donorThread, this);
+ 
+       // reset the real tlab fields to zero so we are sure the thread doesn't use it
+       tlab->reset_to_null();
      }
    }
  
    ~HSAILAllocationInfo() {
      FREE_C_HEAP_ARRAY(HSAILTlabInfo*, _cur_tlab_infos, mtInternal);
*** 180,189 ****
--- 183,202 ----
              tty->print_cr("tlabInfo %p (donorThread = %p) overflowed by %ld bytes, setting last good top to %p", tlabInfo, donorThread, overflowAmount, tlabInfo->last_good_top());
            }
            tlabInfo->_top = tlabInfo->last_good_top();
          }
  
+         // see if the donor thread actually tried to allocate anything while we were running
+         // if so we will retire that one as we overwrite with our new one
+         if (tlab->top() != NULL) {
+           if (TraceGPUInteraction) {
+             tty->print("Donor Thread allocated new tlab");
+             printTlabInfoFromThread(tlab);
+           }
+           tlab->make_parsable(true);
+         }
+ 
          // fill the donor thread tlab with the tlabInfo information
          // we do this even if it will get overwritten by a later tlabinfo
          // because it helps with tlab statistics for that donor thread
          tlab->fill(tlabInfo->start(), tlabInfo->top(), (tlabInfo->end() - tlabInfo->start()) + tlab->alignment_reserve());