NEX-5177 backport illumos 6345 remove xhat support
Reviewed by: Kevin Crowe <kevin.crowe@nexenta.com>
6345 remove xhat support
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
NEX-5164 backport illumos 6514 AS_* lock macros simplification
Reviewed by: Kevin Crowe <kevin.crowe@nexenta.com>
6514 AS_* lock macros simplification
Reviewed by: Piotr Jasiukajtis <estibi@me.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed by: Albert Lee <trisk@omniti.com>
Approved by: Dan McDonald <danmcd@omniti.com>
re #13613 rb4516 Tunables needs volatile keyword

@@ -18,10 +18,11 @@
  *
  * CDDL HEADER END
  */
 /*
  * Copyright (c) 1993, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2015, Joyent, Inc. All rights reserved.
  * Copyright (c) 2016 by Delphix. All rights reserved.
  */
 
 #include <sys/param.h>

@@ -68,11 +69,11 @@
  * be able to use up more memory for ISM so we set the default
  * segspt_minfree to 5% (which gives ISM max 95% of availrmem.
  * If somebody wants even more memory for ISM (risking hanging
  * the system) they can patch the segspt_minfree to smaller number.
  */
-pgcnt_t segspt_minfree = 0;
+volatile pgcnt_t segspt_minfree = 0;
 
 static int segspt_create(struct seg *seg, caddr_t argsp);
 static int segspt_unmap(struct seg *seg, caddr_t raddr, size_t ssize);
 static void segspt_free(struct seg *seg);
 static void segspt_free_pages(struct seg *seg, caddr_t addr, size_t len);