NEX-17845 Remove support for BZIP2 from dump
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
re #13613 rb4516 Tunables needs volatile keyword

@@ -19,10 +19,11 @@
  * CDDL HEADER END
  */
 
 /*
  * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2018 Nexenta Systems, Inc.  All rights reserved.
  * Copyright 2017, Joyent, Inc.
  */
 /*
  * Copyright (c) 2010, Intel Corporation.
  * All rights reserved.

@@ -169,11 +170,11 @@
 
 /*
  * maxphys - used during physio
  * klustsize - used for klustering by swapfs and specfs
  */
-int maxphys = 56 * 1024;    /* XXX See vm_subr.c - max b_count in physio */
+volatile int maxphys = 56 * 1024; /* See vm_subr.c - max b_bcount in physio */
 int klustsize = 56 * 1024;
 
 caddr_t p0_va;          /* Virtual address for accessing physical page 0 */
 
 /*

@@ -1237,17 +1238,10 @@
                 npages += mp->ml_size >> PAGESHIFT;
 
         return (npages);
 }
 
-/* cpu threshold for compressed dumps */
-#ifdef _LP64
-uint_t dump_plat_mincpu_default = DUMP_PLAT_X86_64_MINCPU;
-#else
-uint_t dump_plat_mincpu_default = DUMP_PLAT_X86_32_MINCPU;
-#endif
-
 int
 dump_plat_addr()
 {
 #ifdef __xpv
         pfn_t pfn = mmu_btop(xen_info->shared_info) | PFN_IS_FOREIGN_MFN;