re #13613 rb4516 Tunables needs volatile keyword

*** 20,29 ****
--- 20,32 ----
   */
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  */
  
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  /*        All Rights Reserved   */
  
  
*** 118,128 ****
   * Parameter that determines how recently a thread must have run
   * on the CPU to be considered loosely-bound to that CPU to reduce
   * cold cache effects.  The interval is in hertz.
   */
  #define RECHOOSE_INTERVAL 3
! int     rechoose_interval = RECHOOSE_INTERVAL;
  
  /*
   * Parameter that determines how long (in nanoseconds) a thread must
   * be sitting on a run queue before it can be stolen by another CPU
   * to reduce migrations.  The interval is in nanoseconds.
--- 121,131 ----
   * Parameter that determines how recently a thread must have run
   * on the CPU to be considered loosely-bound to that CPU to reduce
   * cold cache effects.  The interval is in hertz.
   */
  #define RECHOOSE_INTERVAL 3
! volatile int    rechoose_interval = RECHOOSE_INTERVAL;
  
  /*
   * Parameter that determines how long (in nanoseconds) a thread must
   * be sitting on a run queue before it can be stolen by another CPU
   * to reduce migrations.  The interval is in nanoseconds.