@@ -251,11 +251,11 @@ } } { G1GCParPhaseTimesTracker x(phase_times, G1GCPhaseTimes::ThreadRoots, worker_i); - bool is_par = _g1h->n_par_threads() > 0; + bool is_par = _g1h->n_par_threads() > 1; Threads::possibly_parallel_oops_do(is_par, strong_roots, thread_stack_clds, strong_code); } } void G1RootProcessor::process_vm_roots(OopClosure* strong_roots,