--- old/src/os/bsd/vm/os_bsd.cpp	2015-08-03 01:38:58.113603790 -0400
+++ new/src/os/bsd/vm/os_bsd.cpp	2015-08-03 01:38:56.849531975 -0400
@@ -739,40 +739,35 @@
   pthread_attr_init(&attr);
   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 
-  // stack size
-  if (os::Bsd::supports_variable_stack_size()) {
-    // calculate stack size if it's not specified by caller
-    if (stack_size == 0) {
-      stack_size = os::Bsd::default_stack_size(thr_type);
+  // calculate stack size if it's not specified by caller
+  if (stack_size == 0) {
+    stack_size = os::Bsd::default_stack_size(thr_type);
 
-      switch (thr_type) {
-      case os::java_thread:
-        // Java threads use ThreadStackSize which default value can be
-        // changed with the flag -Xss
-        assert(JavaThread::stack_size_at_create() > 0, "this should be set");
-        stack_size = JavaThread::stack_size_at_create();
+    switch (thr_type) {
+    case os::java_thread:
+      // Java threads use ThreadStackSize which default value can be
+      // changed with the flag -Xss
+      assert(JavaThread::stack_size_at_create() > 0, "this should be set");
+      stack_size = JavaThread::stack_size_at_create();
+      break;
+    case os::compiler_thread:
+      if (CompilerThreadStackSize > 0) {
+        stack_size = (size_t)(CompilerThreadStackSize * K);
         break;
-      case os::compiler_thread:
-        if (CompilerThreadStackSize > 0) {
-          stack_size = (size_t)(CompilerThreadStackSize * K);
-          break;
-        } // else fall through:
-          // use VMThreadStackSize if CompilerThreadStackSize is not defined
-      case os::vm_thread:
-      case os::pgc_thread:
-      case os::cgc_thread:
-      case os::watcher_thread:
-        if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
-        break;
-      }
+      } // else fall through:
+        // use VMThreadStackSize if CompilerThreadStackSize is not defined
+    case os::vm_thread:
+    case os::pgc_thread:
+    case os::cgc_thread:
+    case os::watcher_thread:
+      if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
+      break;
     }
-
-    stack_size = MAX2(stack_size, os::Bsd::min_stack_allowed);
-    pthread_attr_setstacksize(&attr, stack_size);
-  } else {
-    // let pthread_create() pick the default value.
   }
 
+  stack_size = MAX2(stack_size, os::Bsd::min_stack_allowed);
+  pthread_attr_setstacksize(&attr, stack_size);
+
   ThreadState state;
 
   {