--- old/hotspot/src/cpu/sparc/vm/globals_sparc.hpp	Wed Sep  7 16:14:09 2016
+++ new/hotspot/src/cpu/sparc/vm/globals_sparc.hpp	Wed Sep  7 16:14:08 2016
@@ -57,10 +57,12 @@
 
 #ifdef _LP64
 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
+define_pd_global(intx, CompilerThreadStackSize, 1024);
 define_pd_global(intx, ThreadStackSize,       1024);
 define_pd_global(intx, VMThreadStackSize,     1024);
 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
 #else
+define_pd_global(intx, CompilerThreadStackSize, 512);
 define_pd_global(intx, ThreadStackSize,       512);
 define_pd_global(intx, VMThreadStackSize,     512);
 #define DEFAULT_STACK_SHADOW_PAGES (6 DEBUG_ONLY(+2))
--- old/hotspot/src/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp	Wed Sep  7 16:14:12 2016
+++ new/hotspot/src/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp	Wed Sep  7 16:14:11 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2012, 2015 SAP SE. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -33,10 +33,6 @@
 define_pd_global(intx, ThreadStackSize,          2048); // 0 => use system default
 define_pd_global(intx, VMThreadStackSize,        2048);
 
-// if we set CompilerThreadStackSize to a value different than 0, it will
-// be used in os::create_thread(). Otherwise, due the strange logic in os::create_thread(),
-// the stack size for compiler threads will default to VMThreadStackSize, although it
-// is defined to 4M in os::Aix::default_stack_size()!
 define_pd_global(intx, CompilerThreadStackSize,  4096);
 
 // Allow extra space in DEBUG builds for asserts.
--- old/hotspot/src/os_cpu/aix_ppc/vm/os_aix_ppc.cpp	Wed Sep  7 16:14:14 2016
+++ new/hotspot/src/os_cpu/aix_ppc/vm/os_aix_ppc.cpp	Wed Sep  7 16:14:13 2016
@@ -533,23 +533,17 @@
 ////////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Aix::min_stack_allowed = 128*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 
 // return default stack size for thr_type
-size_t os::Aix::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
   // default stack size (compiler thread needs larger stack)
-  // Notice that the setting for compiler threads here have no impact
-  // because of the strange 'fallback logic' in os::create_thread().
-  // Better set CompilerThreadStackSize in globals_<os_cpu>.hpp if you want to
-  // specify a different stack size for compiler threads!
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
   return s;
 }
 
-size_t os::Aix::default_guard_size(os::ThreadType thr_type) {
-  return 2 * page_size();
-}
-
 /////////////////////////////////////////////////////////////////////////////
 // helper functions for fatal error handler
 
--- old/hotspot/src/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp	Wed Sep  7 16:14:17 2016
+++ new/hotspot/src/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp	Wed Sep  7 16:14:16 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -31,9 +31,11 @@
 //
 define_pd_global(bool, DontYieldALot,            false);
 #ifdef AMD64
+define_pd_global(intx, CompilerThreadStackSize,  1024);
 define_pd_global(intx, ThreadStackSize,          1024); // 0 => use system default
 define_pd_global(intx, VMThreadStackSize,        1024);
 #else
+define_pd_global(intx, CompilerThreadStackSize,  512);
 // ThreadStackSize 320 allows a couple of test cases to run while
 // keeping the number of threads that can be created high.  System
 // default ThreadStackSize appears to be 512 which is too big.
@@ -41,7 +43,6 @@
 define_pd_global(intx, VMThreadStackSize,        512);
 #endif // AMD64
 
-define_pd_global(intx, CompilerThreadStackSize,  0);
 
 define_pd_global(size_t, JVMInvokeMethodSlack,   8192);
 
--- old/hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp	Wed Sep  7 16:14:19 2016
+++ new/hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp	Wed Sep  7 16:14:19 2016
@@ -838,9 +838,13 @@
 // thread stack
 
 #ifdef AMD64
-size_t os::Bsd::min_stack_allowed  = 64 * K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 64 * K;
 #else
-size_t os::Bsd::min_stack_allowed  =  (48 DEBUG_ONLY(+4))*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = (48 DEBUG_ONLY(+ 4)) * K;
+size_t os::Posix::_java_thread_min_stack_allowed = (48 DEBUG_ONLY(+ 4)) * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = (48 DEBUG_ONLY(+ 4)) * K;
 
 #ifdef __GNUC__
 #define GET_GS() ({int gs; __asm__ volatile("movw %%gs, %w0":"=q"(gs)); gs&0xffff;})
@@ -849,7 +853,7 @@
 #endif // AMD64
 
 // return default stack size for thr_type
-size_t os::Bsd::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
   // default stack size (compiler thread needs larger stack)
 #ifdef AMD64
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
@@ -859,11 +863,6 @@
   return s;
 }
 
-size_t os::Bsd::default_guard_size(os::ThreadType thr_type) {
-  // Creating guard page is very expensive. Java thread has HotSpot
-  // guard page, only enable glibc guard page for non-Java threads.
-  return (thr_type == java_thread ? 0 : page_size());
-}
 
 // Java thread:
 //
--- old/hotspot/src/os_cpu/bsd_zero/vm/os_bsd_zero.cpp	Wed Sep  7 16:14:22 2016
+++ new/hotspot/src/os_cpu/bsd_zero/vm/os_bsd_zero.cpp	Wed Sep  7 16:14:21 2016
@@ -282,9 +282,11 @@
 ///////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Bsd::min_stack_allowed = 64 * K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 64 * K;
 
-size_t os::Bsd::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
 #ifdef _LP64
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
 #else
@@ -293,12 +295,6 @@
   return s;
 }
 
-size_t os::Bsd::default_guard_size(os::ThreadType thr_type) {
-  // Only enable glibc guard pages for non-Java threads
-  // (Java threads have HotSpot guard pages)
-  return (thr_type == java_thread ? 0 : page_size());
-}
-
 static void current_stack_region(address *bottom, size_t *size) {
   address stack_bottom;
   address stack_top;
--- old/hotspot/src/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp	Wed Sep  7 16:14:24 2016
+++ new/hotspot/src/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp	Wed Sep  7 16:14:23 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -33,7 +33,7 @@
 define_pd_global(intx, ThreadStackSize,          2048); // 0 => use system default
 define_pd_global(intx, VMThreadStackSize,        2048);
 
-define_pd_global(intx, CompilerThreadStackSize,  0);
+define_pd_global(intx, CompilerThreadStackSize,  2048);
 
 define_pd_global(uintx,JVMInvokeMethodSlack,     8192);
 
--- old/hotspot/src/os_cpu/linux_aarch64/vm/os_linux_aarch64.cpp	Wed Sep  7 16:14:26 2016
+++ new/hotspot/src/os_cpu/linux_aarch64/vm/os_linux_aarch64.cpp	Wed Sep  7 16:14:25 2016
@@ -473,10 +473,12 @@
 ////////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Linux::min_stack_allowed  = 64 * K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 64 * K;
 
 // return default stack size for thr_type
-size_t os::Linux::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
   // default stack size (compiler thread needs larger stack)
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
   return s;
--- old/hotspot/src/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp	Wed Sep  7 16:14:29 2016
+++ new/hotspot/src/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp	Wed Sep  7 16:14:28 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2012, 2015 SAP SE. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -33,10 +33,6 @@
 define_pd_global(intx, ThreadStackSize,          2048); // 0 => use system default
 define_pd_global(intx, VMThreadStackSize,        2048);
 
-// if we set CompilerThreadStackSize to a value different than 0, it will
-// be used in os::create_thread(). Otherwise, due the strange logic in os::create_thread(),
-// the stack size for compiler threads will default to VMThreadStackSize, although it
-// is defined to 4M in os::Linux::default_stack_size()!
 define_pd_global(intx, CompilerThreadStackSize,  4096);
 
 // Allow extra space in DEBUG builds for asserts.
--- old/hotspot/src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp	Wed Sep  7 16:14:31 2016
+++ new/hotspot/src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp	Wed Sep  7 16:14:30 2016
@@ -533,15 +533,13 @@
 ////////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Linux::min_stack_allowed = 128*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 
 // return default stack size for thr_type
-size_t os::Linux::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
   // default stack size (compiler thread needs larger stack)
-  // Notice that the setting for compiler threads here have no impact
-  // because of the strange 'fallback logic' in os::create_thread().
-  // Better set CompilerThreadStackSize in globals_<os_cpu>.hpp if you want to
-  // specify a different stack size for compiler threads!
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1024 * K);
   return s;
 }
--- old/hotspot/src/os_cpu/linux_sparc/vm/globals_linux_sparc.hpp	Wed Sep  7 16:14:33 2016
+++ new/hotspot/src/os_cpu/linux_sparc/vm/globals_linux_sparc.hpp	Wed Sep  7 16:14:32 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -31,7 +31,6 @@
 //
 
 define_pd_global(size_t, JVMInvokeMethodSlack,   12288);
-define_pd_global(intx, CompilerThreadStackSize,  0);
 
 // Used on 64 bit platforms for UseCompressedOops base address
 define_pd_global(size_t, HeapBaseMinAddress,     CONST64(4)*G);
--- old/hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp	Wed Sep  7 16:14:35 2016
+++ new/hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp	Wed Sep  7 16:14:34 2016
@@ -726,10 +726,12 @@
 ///////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Linux::min_stack_allowed  = 128 * K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 
 // return default stack size for thr_type
-size_t os::Linux::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
   // default stack size (compiler thread needs larger stack)
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
   return s;
--- old/hotspot/src/os_cpu/linux_x86/vm/globals_linux_x86.hpp	Wed Sep  7 16:14:37 2016
+++ new/hotspot/src/os_cpu/linux_x86/vm/globals_linux_x86.hpp	Wed Sep  7 16:14:36 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -30,9 +30,11 @@
 
 define_pd_global(bool, DontYieldALot,            false);
 #ifdef AMD64
+define_pd_global(intx, CompilerThreadStackSize,  1024);
 define_pd_global(intx, ThreadStackSize,          1024); // 0 => use system default
 define_pd_global(intx, VMThreadStackSize,        1024);
 #else
+define_pd_global(intx, CompilerThreadStackSize,  512);
 // ThreadStackSize 320 allows a couple of test cases to run while
 // keeping the number of threads that can be created high.  System
 // default ThreadStackSize appears to be 512 which is too big.
@@ -40,8 +42,6 @@
 define_pd_global(intx, VMThreadStackSize,        512);
 #endif // AMD64
 
-define_pd_global(intx, CompilerThreadStackSize,  0);
-
 define_pd_global(size_t, JVMInvokeMethodSlack,   8192);
 
 // Used on 64 bit platforms for UseCompressedOops base address
--- old/hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Wed Sep  7 16:14:40 2016
+++ new/hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Wed Sep  7 16:14:39 2016
@@ -676,13 +676,17 @@
 // thread stack
 
 #ifdef AMD64
-size_t os::Linux::min_stack_allowed  = 64 * K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 64 * K;
 #else
-size_t os::Linux::min_stack_allowed  =  (48 DEBUG_ONLY(+4))*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = (48 DEBUG_ONLY(+ 4)) * K;
+size_t os::Posix::_java_thread_min_stack_allowed = (48 DEBUG_ONLY(+ 4)) * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = (48 DEBUG_ONLY(+ 4)) * K;
 #endif // AMD64
 
 // return default stack size for thr_type
-size_t os::Linux::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
   // default stack size (compiler thread needs larger stack)
 #ifdef AMD64
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
--- old/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.cpp	Wed Sep  7 16:14:42 2016
+++ new/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.cpp	Wed Sep  7 16:14:41 2016
@@ -307,9 +307,11 @@
 ///////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Linux::min_stack_allowed = 64 * K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 64 * K;
 
-size_t os::Linux::default_stack_size(os::ThreadType thr_type) {
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
 #ifdef _LP64
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
 #else
--- old/hotspot/src/os_cpu/solaris_sparc/vm/globals_solaris_sparc.hpp	Wed Sep  7 16:14:44 2016
+++ new/hotspot/src/os_cpu/solaris_sparc/vm/globals_solaris_sparc.hpp	Wed Sep  7 16:14:43 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -31,7 +31,6 @@
 //
 
 define_pd_global(size_t, JVMInvokeMethodSlack,   12288);
-define_pd_global(intx, CompilerThreadStackSize,  0);
 
 // Used on 64 bit platforms for UseCompressedOops base address
 #ifdef _LP64
--- old/hotspot/src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp	Wed Sep  7 16:14:46 2016
+++ new/hotspot/src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp	Wed Sep  7 16:14:45 2016
@@ -84,9 +84,13 @@
 // Minimum stack size for the VM.  It's easier to document a constant
 // but it's different for x86 and sparc because the page sizes are different.
 #ifdef _LP64
-size_t os::Solaris::min_stack_allowed = 128*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 #else
-size_t os::Solaris::min_stack_allowed = 96*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 96 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 96 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 96 * K;
 #endif
 
 int os::Solaris::max_register_window_saves_before_flushing() {
--- old/hotspot/src/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp	Wed Sep  7 16:14:49 2016
+++ new/hotspot/src/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp	Wed Sep  7 16:14:48 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -30,10 +30,12 @@
 
 define_pd_global(bool, DontYieldALot,            true); // Determined in the design center
 #ifdef AMD64
+define_pd_global(intx, CompilerThreadStackSize,  1024);
 define_pd_global(intx, ThreadStackSize,          1024); // 0 => use system default
 define_pd_global(intx, VMThreadStackSize,        1024);
 define_pd_global(size_t, JVMInvokeMethodSlack,   8*K);
 #else
+define_pd_global(intx, CompilerThreadStackSize,  512);
 // ThreadStackSize 320 allows a couple of test cases to run while
 // keeping the number of threads that can be created high.
 define_pd_global(intx, ThreadStackSize,          320);
@@ -41,7 +43,6 @@
 define_pd_global(size_t, JVMInvokeMethodSlack,   10*K);
 #endif // AMD64
 
-define_pd_global(intx, CompilerThreadStackSize,  0);
 
 // Used on 64 bit platforms for UseCompressedOops base address
 define_pd_global(size_t, HeapBaseMinAddress,     2*G);
--- old/hotspot/src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp	Wed Sep  7 16:14:51 2016
+++ new/hotspot/src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp	Wed Sep  7 16:14:50 2016
@@ -86,15 +86,19 @@
 
 #define MAX_PATH (2 * K)
 
-// Minimum stack size for the VM.  It's easier to document a constant value
+// Minimum stack sizes for the VM.  It's easier to document a constant value
 // but it's different for x86 and sparc because the page sizes are different.
 #ifdef AMD64
-size_t os::Solaris::min_stack_allowed = 224*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 394 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 224 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 224 * K;
 #define REG_SP REG_RSP
 #define REG_PC REG_RIP
 #define REG_FP REG_RBP
 #else
-size_t os::Solaris::min_stack_allowed = 64*K;
+size_t os::Posix::_compiler_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 64 * K;
+size_t os::Posix::_vm_internal_thread_min_stack_allowed = 64 * K;
 #define REG_SP UESP
 #define REG_PC EIP
 #define REG_FP EBP
--- old/hotspot/src/os/aix/vm/os_aix.cpp	Wed Sep  7 16:14:53 2016
+++ new/hotspot/src/os/aix/vm/os_aix.cpp	Wed Sep  7 16:14:52 2016
@@ -847,7 +847,8 @@
   return 0;
 }
 
-bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
+bool os::create_thread(Thread* thread, ThreadType thr_type,
+                       size_t req_stack_size) {
 
   assert(thread->osthread() == NULL, "caller responsible");
 
@@ -880,37 +881,12 @@
   guarantee(pthread_attr_setsuspendstate_np(&attr, PTHREAD_CREATE_SUSPENDED_NP) == 0, "???");
 
   // calculate stack size if it's not specified by caller
-  if (stack_size == 0) {
-    stack_size = os::Aix::default_stack_size(thr_type);
-
-    switch (thr_type) {
-    case os::java_thread:
-      // Java threads use ThreadStackSize whose 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;
-      } // 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::Aix::min_stack_allowed);
+  size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
   pthread_attr_setstacksize(&attr, stack_size);
 
   pthread_t tid;
   int ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
 
-
   char buf[64];
   if (ret == 0) {
     log_info(os, thread)("Thread started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
@@ -3593,32 +3569,11 @@
   Aix::signal_sets_init();
   Aix::install_signal_handlers();
 
-  // Check minimum allowable stack size for thread creation and to initialize
-  // the java system classes, including StackOverflowError - depends on page
-  // size. Add two 4K pages for compiler2 recursion in main thread.
-  // Add in 4*BytesPerWord 4K pages to account for VM stack during
-  // class initialization depending on 32 or 64 bit VM.
-  os::Aix::min_stack_allowed = MAX2(os::Aix::min_stack_allowed,
-                                    JavaThread::stack_guard_zone_size() +
-                                    JavaThread::stack_shadow_zone_size() +
-                                    (4*BytesPerWord COMPILER2_PRESENT(+2)) * 4 * K);
-
-  os::Aix::min_stack_allowed = align_size_up(os::Aix::min_stack_allowed, os::vm_page_size());
-
-  size_t threadStackSizeInBytes = ThreadStackSize * K;
-  if (threadStackSizeInBytes != 0 &&
-      threadStackSizeInBytes < os::Aix::min_stack_allowed) {
-    tty->print_cr("\nThe stack size specified is too small, "
-                  "Specify at least %dk",
-                  os::Aix::min_stack_allowed / K);
+  // Check and sets minimum stack sizes against command line options
+  if (Posix::set_minimum_stack_sizes() == JNI_ERR) {
     return JNI_ERR;
   }
 
-  // Make the stack size a multiple of the page size so that
-  // the yellow/red zones can be guarded.
-  // Note that this can be 0, if no default stacksize was set.
-  JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, vm_page_size()));
-
   if (UseNUMA) {
     UseNUMA = false;
     warning("NUMA optimizations are not available on this OS.");
--- old/hotspot/src/os/aix/vm/os_aix.hpp	Wed Sep  7 16:14:56 2016
+++ new/hotspot/src/os/aix/vm/os_aix.hpp	Wed Sep  7 16:14:55 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2013, 2016 SAP SE. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -140,14 +140,6 @@
   // libpthread version string
   static void libpthread_init();
 
-  // Minimum stack size a thread can be created with (allowing
-  // the VM to completely create the thread and enter user code)
-  static size_t min_stack_allowed;
-
-  // Return default stack size or guard size for the specified thread type
-  static size_t default_stack_size(os::ThreadType thr_type);
-  static size_t default_guard_size(os::ThreadType thr_type);
-
   // Function returns true if we run on OS/400 (pase), false if we run
   // on AIX.
   static bool on_pase() {
--- old/hotspot/src/os/bsd/vm/os_bsd.cpp	Wed Sep  7 16:14:59 2016
+++ new/hotspot/src/os/bsd/vm/os_bsd.cpp	Wed Sep  7 16:14:57 2016
@@ -734,7 +734,8 @@
   return 0;
 }
 
-bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
+bool os::create_thread(Thread* thread, ThreadType thr_type,
+                       size_t req_stack_size) {
   assert(thread->osthread() == NULL, "caller responsible");
 
   // Allocate the OSThread object
@@ -757,32 +758,7 @@
   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 
   // 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();
-      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;
-    }
-  }
-
-  stack_size = MAX2(stack_size, os::Bsd::min_stack_allowed);
+  size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
   pthread_attr_setstacksize(&attr, stack_size);
 
   ThreadState state;
@@ -3502,32 +3478,11 @@
   Bsd::signal_sets_init();
   Bsd::install_signal_handlers();
 
-  // Check minimum allowable stack size for thread creation and to initialize
-  // the java system classes, including StackOverflowError - depends on page
-  // size.  Add two 4K pages for compiler2 recursion in main thread.
-  // Add in 4*BytesPerWord 4K pages to account for VM stack during
-  // class initialization depending on 32 or 64 bit VM.
-  os::Bsd::min_stack_allowed = MAX2(os::Bsd::min_stack_allowed,
-                                    JavaThread::stack_guard_zone_size() +
-                                    JavaThread::stack_shadow_zone_size() +
-                                    (4*BytesPerWord COMPILER2_PRESENT(+2)) * 4 * K);
-
-  os::Bsd::min_stack_allowed = align_size_up(os::Bsd::min_stack_allowed, os::vm_page_size());
-
-  size_t threadStackSizeInBytes = ThreadStackSize * K;
-  if (threadStackSizeInBytes != 0 &&
-      threadStackSizeInBytes < os::Bsd::min_stack_allowed) {
-    tty->print_cr("\nThe stack size specified is too small, "
-                  "Specify at least %dk",
-                  os::Bsd::min_stack_allowed/ K);
+  // Check and sets minimum stack sizes against command line options
+  if (Posix::set_minimum_stack_sizes() == JNI_ERR) {
     return JNI_ERR;
   }
 
-  // Make the stack size a multiple of the page size so that
-  // the yellow/red zones can be guarded.
-  JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
-                                                vm_page_size()));
-
   if (MaxFDLimit) {
     // set the number of file descriptors to max. print out error
     // if getrlimit/setrlimit fails but continue regardless.
--- old/hotspot/src/os/bsd/vm/os_bsd.hpp	Wed Sep  7 16:15:02 2016
+++ new/hotspot/src/os/bsd/vm/os_bsd.hpp	Wed Sep  7 16:15:01 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -120,14 +120,6 @@
   static struct sigaction *get_chained_signal_action(int sig);
   static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
 
-  // Minimum stack size a thread can be created with (allowing
-  // the VM to completely create the thread and enter user code)
-  static size_t min_stack_allowed;
-
-  // Return default stack size or guard size for the specified thread type
-  static size_t default_stack_size(os::ThreadType thr_type);
-  static size_t default_guard_size(os::ThreadType thr_type);
-
   // Real-time clock functions
   static void clock_init(void);
 
--- old/hotspot/src/os/linux/vm/os_linux.cpp	Wed Sep  7 16:15:04 2016
+++ new/hotspot/src/os/linux/vm/os_linux.cpp	Wed Sep  7 16:15:03 2016
@@ -701,7 +701,7 @@
 }
 
 bool os::create_thread(Thread* thread, ThreadType thr_type,
-                       size_t stack_size) {
+                       size_t req_stack_size) {
   assert(thread->osthread() == NULL, "caller responsible");
 
   // Allocate the OSThread object
@@ -723,34 +723,8 @@
   pthread_attr_init(&attr);
   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 
-  // stack size
   // calculate stack size if it's not specified by caller
-  if (stack_size == 0) {
-    stack_size = os::Linux::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();
-      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;
-    }
-  }
-
-  stack_size = MAX2(stack_size, os::Linux::min_stack_allowed);
+  size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
   pthread_attr_setstacksize(&attr, stack_size);
 
   // glibc guard page
@@ -956,10 +930,9 @@
 // bogus value for initial thread.
 void os::Linux::capture_initial_stack(size_t max_size) {
   // stack size is the easy part, get it from RLIMIT_STACK
-  size_t stack_size;
   struct rlimit rlim;
   getrlimit(RLIMIT_STACK, &rlim);
-  stack_size = rlim.rlim_cur;
+  size_t stack_size = rlim.rlim_cur;
 
   // 6308388: a bug in ld.so will relocate its own .data section to the
   //   lower end of primordial stack; reduce ulimit -s value a little bit
@@ -4793,32 +4766,10 @@
   Linux::signal_sets_init();
   Linux::install_signal_handlers();
 
-  // Check minimum allowable stack size for thread creation and to initialize
-  // the java system classes, including StackOverflowError - depends on page
-  // size.  Add two 4K pages for compiler2 recursion in main thread.
-  // Add in 4*BytesPerWord 4K pages to account for VM stack during
-  // class initialization depending on 32 or 64 bit VM.
-  os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed,
-                                      JavaThread::stack_guard_zone_size() +
-                                      JavaThread::stack_shadow_zone_size() +
-                                      (4*BytesPerWord COMPILER2_PRESENT(+2)) * 4 * K);
-
-  os::Linux::min_stack_allowed = align_size_up(os::Linux::min_stack_allowed, os::vm_page_size());
-
-  size_t threadStackSizeInBytes = ThreadStackSize * K;
-  if (threadStackSizeInBytes != 0 &&
-      threadStackSizeInBytes < os::Linux::min_stack_allowed) {
-    tty->print_cr("\nThe stack size specified is too small, "
-                  "Specify at least " SIZE_FORMAT "k",
-                  os::Linux::min_stack_allowed/ K);
+  // Check and sets minimum stack sizes against command line options
+  if (Posix::set_minimum_stack_sizes() == JNI_ERR) {
     return JNI_ERR;
   }
-
-  // Make the stack size a multiple of the page size so that
-  // the yellow/red zones can be guarded.
-  JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
-                                                vm_page_size()));
-
   Linux::capture_initial_stack(JavaThread::stack_size_at_create());
 
 #if defined(IA32)
--- old/hotspot/src/os/linux/vm/os_linux.hpp	Wed Sep  7 16:15:07 2016
+++ new/hotspot/src/os/linux/vm/os_linux.hpp	Wed Sep  7 16:15:06 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -170,12 +170,8 @@
   static void libpthread_init();
   static bool libnuma_init();
   static void* libnuma_dlsym(void* handle, const char* name);
-  // Minimum stack size a thread can be created with (allowing
-  // the VM to completely create the thread and enter user code)
-  static size_t min_stack_allowed;
 
-  // Return default stack size or guard size for the specified thread type
-  static size_t default_stack_size(os::ThreadType thr_type);
+  // Return default guard size for the specified thread type
   static size_t default_guard_size(os::ThreadType thr_type);
 
   static void capture_initial_stack(size_t max_size);
--- old/hotspot/src/os/posix/vm/os_posix.cpp	Wed Sep  7 16:15:09 2016
+++ new/hotspot/src/os/posix/vm/os_posix.cpp	Wed Sep  7 16:15:08 2016
@@ -1099,7 +1099,124 @@
   return buf;
 }
 
+// Check minimum allowable stack sizes for thread creation and to initialize
+// the java system classes, including StackOverflowError - depends on page
+// size.  Add two 4K pages for compiler2 recursion in main thread.
+// Add in 4*BytesPerWord 4K pages to account for VM stack during
+// class initialization depending on 32 or 64 bit VM.
+jint os::Posix::set_minimum_stack_sizes() {
+  _java_thread_min_stack_allowed = MAX2(_java_thread_min_stack_allowed,
+                                        JavaThread::stack_guard_zone_size() +
+                                        JavaThread::stack_shadow_zone_size() +
+                                        (4 * BytesPerWord COMPILER2_PRESENT(+ 2)) * 4 * K);
 
+  _java_thread_min_stack_allowed = align_size_up(_java_thread_min_stack_allowed, vm_page_size());
+
+  size_t stack_size_in_bytes = ThreadStackSize * K;
+  if (stack_size_in_bytes != 0 &&
+      stack_size_in_bytes < _java_thread_min_stack_allowed) {
+    // The '-Xss' and '-XX:ThreadStackSize=N' options both set
+    // ThreadStackSize so we go with "Java thread stack size" instead
+    // of "ThreadStackSize" to be more friendly.
+    tty->print_cr("\nThe Java thread stack size specified is too small. "
+                  "Specify at least " SIZE_FORMAT "k",
+                  _java_thread_min_stack_allowed / K);
+    return JNI_ERR;
+  }
+
+#ifdef SOLARIS
+  // For 64kbps there will be a 64kb page size, which makes
+  // the usable default stack size quite a bit less.  Increase the
+  // stack for 64kb (or any > than 8kb) pages, this increases
+  // virtual memory fragmentation (since we're not creating the
+  // stack on a power of 2 boundary.  The real fix for this
+  // should be to fix the guard page mechanism.
+
+  if (vm_page_size() > 8*K) {
+    stack_size_in_bytes = (stack_size_in_bytes != 0)
+       ? stack_size_in_bytes +
+         JavaThread::stack_red_zone_size() +
+         JavaThread::stack_yellow_zone_size()
+       : 0;
+    ThreadStackSize = stack_size_in_bytes/K;
+  }
+#endif // SOLARIS
+
+  // Make the stack size a multiple of the page size so that
+  // the yellow/red zones can be guarded.
+  JavaThread::set_stack_size_at_create(round_to(stack_size_in_bytes,
+                                                vm_page_size()));
+
+  _compiler_thread_min_stack_allowed = align_size_up(_compiler_thread_min_stack_allowed, vm_page_size());
+
+  stack_size_in_bytes = CompilerThreadStackSize * K;
+  if (stack_size_in_bytes != 0 &&
+      stack_size_in_bytes < _compiler_thread_min_stack_allowed) {
+    tty->print_cr("\nThe CompilerThreadStackSize specified is too small. "
+                  "Specify at least " SIZE_FORMAT "k",
+                  _compiler_thread_min_stack_allowed / K);
+    return JNI_ERR;
+  }
+
+  _vm_internal_thread_min_stack_allowed = align_size_up(_vm_internal_thread_min_stack_allowed, vm_page_size());
+
+  stack_size_in_bytes = VMThreadStackSize * K;
+  if (stack_size_in_bytes != 0 &&
+      stack_size_in_bytes < _vm_internal_thread_min_stack_allowed) {
+    tty->print_cr("\nThe VMThreadStackSize specified is too small. "
+                  "Specify at least " SIZE_FORMAT "k",
+                  _vm_internal_thread_min_stack_allowed / K);
+    return JNI_ERR;
+  }
+  return JNI_OK;
+}
+
+// Called when creating the thread.  The minimum stack sizes have already been calculated
+size_t os::Posix::get_initial_stack_size(ThreadType thr_type, size_t req_stack_size) {
+  size_t stack_size;
+  if (req_stack_size == 0) {
+    stack_size = default_stack_size(thr_type);
+  } else {
+    stack_size = req_stack_size;
+  }
+
+  switch (thr_type) {
+  case os::java_thread:
+    // Java threads use ThreadStackSize which default value can be
+    // changed with the flag -Xss
+    if (req_stack_size == 0 && JavaThread::stack_size_at_create() > 0) {
+      // no requested size and we have a more specific default value
+      stack_size = JavaThread::stack_size_at_create();
+    }
+    stack_size = MAX2(stack_size,
+                      _java_thread_min_stack_allowed);
+    break;
+  case os::compiler_thread:
+    if (req_stack_size == 0 && CompilerThreadStackSize > 0) {
+      // no requested size and we have a more specific default value
+      stack_size = (size_t)(CompilerThreadStackSize * K);
+    }
+    stack_size = MAX2(stack_size,
+                      _compiler_thread_min_stack_allowed);
+    break;
+  case os::vm_thread:
+  case os::pgc_thread:
+  case os::cgc_thread:
+  case os::watcher_thread:
+  default:  // presume the unknown thr_type is a VM internal
+    if (req_stack_size == 0 && VMThreadStackSize > 0) {
+      // no requested size and we have a more specific default value
+      stack_size = (size_t)(VMThreadStackSize * K);
+    }
+
+    stack_size = MAX2(stack_size,
+                      _vm_internal_thread_min_stack_allowed);
+    break;
+  }
+
+  return stack_size;
+}
+
 os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() {
   assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread");
 }
--- old/hotspot/src/os/posix/vm/os_posix.hpp	Wed Sep  7 16:15:11 2016
+++ new/hotspot/src/os/posix/vm/os_posix.hpp	Wed Sep  7 16:15:10 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -42,7 +42,18 @@
   static void print_libversion_info(outputStream* st);
   static void print_load_average(outputStream* st);
 
+  // Minimum stack size a thread can be created with (allowing
+  // the VM to completely create the thread and enter user code)
+  static size_t _compiler_thread_min_stack_allowed;
+  static size_t _java_thread_min_stack_allowed;
+  static size_t _vm_internal_thread_min_stack_allowed;
+
 public:
+  // Return default stack size for the specified thread type
+  static size_t default_stack_size(os::ThreadType thr_type);
+  // Check and sets minimum stack sizes
+  static jint set_minimum_stack_sizes();
+  static size_t get_initial_stack_size(ThreadType thr_type, size_t req_stack_size);
 
   // Returns true if signal is valid.
   static bool is_valid_signal(int sig);
--- old/hotspot/src/os/solaris/vm/os_solaris.cpp	Wed Sep  7 16:15:13 2016
+++ new/hotspot/src/os/solaris/vm/os_solaris.cpp	Wed Sep  7 16:15:13 2016
@@ -917,8 +917,15 @@
   return buf;
 }
 
+// return default stack size for thr_type
+size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
+  // default stack size when not specified by caller is 1M (2M for LP64)
+  size_t s = (BytesPerWord >> 2) * K * K;
+  return s;
+}
+
 bool os::create_thread(Thread* thread, ThreadType thr_type,
-                       size_t stack_size) {
+                       size_t req_stack_size) {
   // Allocate the OSThread object
   OSThread* osthread = new OSThread(NULL, NULL);
   if (osthread == NULL) {
@@ -953,32 +960,9 @@
     tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
   }
 
-  // Calculate stack size if it's not specified by caller.
-  if (stack_size == 0) {
-    // The default stack size 1M (2M for LP64).
-    stack_size = (BytesPerWord >> 2) * K * K;
+  // calculate stack size if it's not specified by caller
+  size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
 
-    switch (thr_type) {
-    case os::java_thread:
-      // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
-      if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
-      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;
-    }
-  }
-  stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
-
   // Initial state is ALLOCATED but not INITIALIZED
   osthread->set_state(ALLOCATED);
 
@@ -4400,7 +4384,12 @@
   // Constant minimum stack size allowed. It must be at least
   // the minimum of what the OS supports (thr_min_stack()), and
   // enough to allow the thread to get to user bytecode execution.
-  Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
+  Posix::_compiler_thread_min_stack_allowed = MAX2(thr_min_stack(),
+                                                   Posix::_compiler_thread_min_stack_allowed);
+  Posix::_java_thread_min_stack_allowed = MAX2(thr_min_stack(),
+                                               Posix::_java_thread_min_stack_allowed);
+  Posix::_vm_internal_thread_min_stack_allowed = MAX2(thr_min_stack(),
+                                                      Posix::_vm_internal_thread_min_stack_allowed);
 
   // dynamic lookup of functions that may not be available in our lowest
   // supported Solaris release
@@ -4445,47 +4434,11 @@
     log_info(os)("Memory Serialize Page address: " INTPTR_FORMAT, p2i(mem_serialize_page));
   }
 
-  // Check minimum allowable stack size for thread creation and to initialize
-  // the java system classes, including StackOverflowError - depends on page
-  // size.  Add two 4K pages for compiler2 recursion in main thread.
-  // Add in 4*BytesPerWord 4K pages to account for VM stack during
-  // class initialization depending on 32 or 64 bit VM.
-  os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
-                                        JavaThread::stack_guard_zone_size() +
-                                        JavaThread::stack_shadow_zone_size() +
-                                        (4*BytesPerWord COMPILER2_PRESENT(+2)) * 4 * K);
-
-  os::Solaris::min_stack_allowed = align_size_up(os::Solaris::min_stack_allowed, os::vm_page_size());
-
-  size_t threadStackSizeInBytes = ThreadStackSize * K;
-  if (threadStackSizeInBytes != 0 &&
-      threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
-    tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
-                  os::Solaris::min_stack_allowed/K);
+  // Check and sets minimum stack sizes against command line options
+  if (Posix::set_minimum_stack_sizes() == JNI_ERR) {
     return JNI_ERR;
   }
 
-  // For 64kbps there will be a 64kb page size, which makes
-  // the usable default stack size quite a bit less.  Increase the
-  // stack for 64kb (or any > than 8kb) pages, this increases
-  // virtual memory fragmentation (since we're not creating the
-  // stack on a power of 2 boundary.  The real fix for this
-  // should be to fix the guard page mechanism.
-
-  if (vm_page_size() > 8*K) {
-    threadStackSizeInBytes = (threadStackSizeInBytes != 0)
-       ? threadStackSizeInBytes +
-         JavaThread::stack_red_zone_size() +
-         JavaThread::stack_yellow_zone_size()
-       : 0;
-    ThreadStackSize = threadStackSizeInBytes/K;
-  }
-
-  // Make the stack size a multiple of the page size so that
-  // the yellow/red zones can be guarded.
-  JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
-                                                vm_page_size()));
-
   Solaris::libthread_init();
 
   if (UseNUMA) {
--- old/hotspot/src/os/solaris/vm/os_solaris.hpp	Wed Sep  7 16:15:16 2016
+++ new/hotspot/src/os/solaris/vm/os_solaris.hpp	Wed Sep  7 16:15:15 2016
@@ -292,11 +292,7 @@
   static          jint  _os_thread_limit;
   static volatile jint  _os_thread_count;
 
-  // Minimum stack size a thread can be created with (allowing
-  // the VM to completely create the thread and enter user code)
 
-  static size_t min_stack_allowed;
-
   // Stack overflow handling
 
   static int max_register_window_saves_before_flushing();
--- old/hotspot/src/os/windows/vm/os_windows.cpp	Wed Sep  7 16:15:19 2016
+++ new/hotspot/src/os/windows/vm/os_windows.cpp	Wed Sep  7 16:15:18 2016
@@ -4207,7 +4207,7 @@
   min_stack_allowed = align_size_up(min_stack_allowed, os::vm_page_size());
 
   if (actual_reserve_size < min_stack_allowed) {
-    tty->print_cr("\nThe stack size specified is too small, "
+    tty->print_cr("\nThe Java thread stack size specified is too small. "
                   "Specify at least %dk",
                   min_stack_allowed / K);
     return JNI_ERR;
--- old/hotspot/src/share/vm/runtime/os.hpp	Wed Sep  7 16:15:22 2016
+++ new/hotspot/src/share/vm/runtime/os.hpp	Wed Sep  7 16:15:21 2016
@@ -443,7 +443,7 @@
 
   static bool create_thread(Thread* thread,
                             ThreadType thr_type,
-                            size_t stack_size = 0);
+                            size_t req_stack_size = 0);
   static bool create_main_thread(JavaThread* thread);
   static bool create_attached_thread(JavaThread* thread);
   static void pd_start_thread(Thread* thread);
--- old/hotspot/src/share/vm/utilities/exceptions.cpp	Wed Sep  7 16:15:24 2016
+++ new/hotspot/src/share/vm/utilities/exceptions.cpp	Wed Sep  7 16:15:23 2016
@@ -80,7 +80,7 @@
   if (h_exception()->klass() == SystemDictionary::StackOverflowError_klass()) {
     InstanceKlass* ik = InstanceKlass::cast(h_exception->klass());
     assert(ik->is_initialized(),
-           "need to increase min_stack_allowed calculation");
+           "need to increase java_thread_min_stack_allowed calculation");
   }
 #endif // ASSERT
 
@@ -227,7 +227,7 @@
     Klass* k = SystemDictionary::StackOverflowError_klass();
     oop e = InstanceKlass::cast(k)->allocate_instance(CHECK);
     exception = Handle(THREAD, e);  // fill_in_stack trace does gc
-    assert(InstanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation");
+    assert(InstanceKlass::cast(k)->is_initialized(), "need to increase java_thread_min_stack_allowed calculation");
     if (StackTraceInThrowable) {
       java_lang_Throwable::fill_in_stack_trace(exception, method());
     }
--- old/hotspot/test/runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java	Wed Sep  7 16:15:26 2016
+++ new/hotspot/test/runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java	Wed Sep  7 16:15:26 2016
@@ -89,20 +89,6 @@
         excludeTestMaxRange("CICompilerCount");
 
         /*
-         * JDK-8136766
-         * Temporarily remove ThreadStackSize from testing because Windows can set it to 0
-         * (for default OS size) but other platforms insist it must be greater than 0
-        */
-        excludeTestRange("ThreadStackSize");
-
-        /*
-         * Remove the flag controlling the size of the stack because the
-         * flag has direct influence on the physical memory usage of
-         * the VM.
-         */
-        allOptionsAsMap.remove("CompilerThreadStackSize");
-
-        /*
          * Exclude MallocMaxTestWords as it is expected to exit VM at small values (>=0)
          */
         excludeTestMinRange("MallocMaxTestWords");
@@ -124,6 +110,8 @@
         excludeTestMaxRange("OldSize");
         excludeTestMaxRange("ParallelGCThreads");
 
+        excludeTestMaxRange("CompilerThreadStackSize");
+        excludeTestMaxRange("ThreadStackSize");
         excludeTestMaxRange("VMThreadStackSize");
 
         /*
--- /dev/null	Wed Sep  7 16:15:29 2016
+++ new/hotspot/test/runtime/Thread/TooSmallStackSize.java	Wed Sep  7 16:15:28 2016
@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8140520
+ * @summary Setting small CompilerThreadStackSize, ThreadStackSize, and
+ * VMThreadStackSize values should result in an error message that shows
+ * the minimum stack size value for each thread type.
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ * @run main TooSmallStackSize
+ */
+
+/*
+ * The primary purpose of this test is to make sure we can run with a
+ * stack smaller than the minimum without crashing. Also this test will
+ * determine the minimum allowed stack size for the platform (as
+ * provided by the JVM error message when a very small stack is used),
+ * and then verify that the JVM can be launched with that stack size
+ * without a crash or any error messages.
+ *
+ * Note: This repo's version of the test uses the '-XX:ThreadStackSize=n'
+ * VM option for Java thread stack size testing. The jdk repo's version
+ * of the test uses the '-Xss' option.
+ */
+
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.process.OutputAnalyzer;
+
+public class TooSmallStackSize {
+    /* for debugging. Normally false. */
+    static final boolean verbose = false;
+    static final String CompilerThreadStackSizeString = "CompilerThreadStackSize";
+    static final String ThreadStackSizeString = "Java thread stack size";
+    static final String VMThreadStackSizeString = "VMThreadStackSize";
+
+    /*
+     * Returns the minimum stack size this platform will allowed based on the
+     * contents of the error message the JVM outputs when too small of a
+     * stack size was used.
+     *
+     * The testOutput argument must contain the result of having already run
+     * the JVM with too small of a stack size.
+     */
+    static String getMinStackAllowed(String testOutput) {
+        /*
+         * The JVM output will contain in one of the lines:
+         *   "The CompilerThreadStackSize specified is too small. Specify at least 100k"
+         *   "The Java thread stack size specified is too small. Specify at least 100k"
+         *   "The VMThreadStackSize specified is too small. Specify at least 100k"
+         * Although the actual size will vary. We need to extract this size
+         * string from the output and return it.
+         */
+        String matchStr = "Specify at least ";
+        int match_idx = testOutput.indexOf(matchStr);
+        if (match_idx >= 0) {
+            int size_start_idx = match_idx + matchStr.length();
+            int k_start_idx = testOutput.indexOf("k", size_start_idx);
+            // don't include the 'k'; the caller will have to
+            // add it back as needed.
+            return testOutput.substring(size_start_idx, k_start_idx);
+        }
+
+        System.out.println("FAILED: Could not get the stack size from the output");
+        throw new RuntimeException("test fails");
+    }
+
+    /*
+     * Run the JVM with the specified stack size.
+     *
+     * Returns the minimum allowed stack size gleaned from the error message,
+     * if there is an error message. Otherwise returns the stack size passed in.
+     */
+    static String checkStack(String stackOption, String optionMesg, String stackSize) throws Exception {
+        String min_stack_allowed;
+
+        System.out.println("*** Testing " + stackOption + stackSize);
+
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+            stackOption + stackSize,
+            // Uncomment the following to get log output
+            // that shows actual thread creation sizes.
+            // "-Xlog:os+thread",
+            "-version");
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+
+        if (verbose) {
+            System.out.println("stdout: " + output.getStdout());
+        }
+
+        if (output.getExitValue() == 0) {
+            // checkMinStackAllowed() is called with stackSize values
+            // that should be the minimum that works. This method,
+            // checkStack(), is called with stackSize values that
+            // should be too small and result in error messages.
+            // However, some platforms fix up a stackSize value that is
+            // too small into something that works so we have to allow
+            // for checkStack() calls that work.
+            System.out.println("PASSED: got exit_code == 0 with " + stackOption + stackSize);
+            min_stack_allowed = stackSize;
+        } else {
+            String expect = "The " + optionMesg + " specified is too small";
+            if (verbose) {
+                System.out.println("Expect='" + expect + "'");
+            }
+            output.shouldContain(expect);
+            min_stack_allowed = getMinStackAllowed(output.getStdout());
+
+            System.out.println("PASSED: got expected error message with " + stackOption + stackSize);
+        }
+
+        return min_stack_allowed;
+    }
+
+    /*
+     * Run the JVM with the minimum allowed stack size. This should always succeed.
+     */
+    static void checkMinStackAllowed(String stackOption, String optionMesg, String stackSize) throws Exception {
+        System.out.println("*** Testing " + stackOption + stackSize);
+
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+            stackOption + stackSize,
+            // Uncomment the following to get log output
+            // that shows actual thread creation sizes.
+            // "-Xlog:os+thread",
+            "-version");
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldHaveExitValue(0);
+
+        System.out.println("PASSED: VM launched with " + stackOption + stackSize);
+    }
+
+    public static void main(String... args) throws Exception {
+        /*
+         * The result of a 16k stack size should be a quick exit with a complaint
+         * that the stack size is too small. However, for some win32 builds, the
+         * stack is always at least 64k, and this also sometimes is the minimum
+         * allowed size, so we won't see an error in this case.
+         *
+         * This test case will also produce a crash on some platforms if the fix
+         * for 6762191 is not yet in place.
+         */
+        checkStack("-XX:ThreadStackSize=", ThreadStackSizeString, "16");
+
+        /*
+         * Try with a 32k stack size, which is the size that the launcher will
+         * set to if you try setting to anything smaller. This should produce the same
+         * result as setting to 16k if the fix for 6762191 is in place.
+         */
+        String min_stack_allowed = checkStack("-XX:ThreadStackSize=", ThreadStackSizeString, "32");
+
+        /*
+         * Try again with a the minimum stack size that was given in the error message
+         */
+        checkMinStackAllowed("-XX:ThreadStackSize=", ThreadStackSizeString, min_stack_allowed);
+
+        /*
+         * Now redo the same tests with the compiler thread stack size:
+         */
+        checkStack("-XX:CompilerThreadStackSize=", CompilerThreadStackSizeString, "16");
+        min_stack_allowed = checkStack("-XX:CompilerThreadStackSize=", CompilerThreadStackSizeString, "32");
+        checkMinStackAllowed("-XX:CompilerThreadStackSize=", CompilerThreadStackSizeString, min_stack_allowed);
+
+        /*
+         * Now redo the same tests with the VM thread stack size:
+         */
+        checkStack("-XX:VMThreadStackSize=", VMThreadStackSizeString, "16");
+        min_stack_allowed = checkStack("-XX:VMThreadStackSize=", VMThreadStackSizeString, "32");
+        checkMinStackAllowed("-XX:VMThreadStackSize=", VMThreadStackSizeString, min_stack_allowed);
+    }
+}
--- old/hotspot/test/TEST.groups	Wed Sep  7 16:15:31 2016
+++ new/hotspot/test/TEST.groups	Wed Sep  7 16:15:30 2016
@@ -375,10 +375,13 @@
  -runtime/SharedArchiveFile/DefaultUseWithClient.java \
  -runtime/Thread/CancellableThreadTest.java \
  -runtime/7158988/FieldMonitor.java \
- -runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java \
+  runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java \
   sanity/ \
   testlibrary_tests/TestMutuallyExclusivePlatformPredicates.java
 
+# Enable runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java
+# above for pre-push testing only.
+
 hotspot_fast_serviceability = \
   sanity/ExecuteInternalVMTests.java \
   serviceability/dcmd/compiler \
--- old/jdk/test/tools/launcher/TooSmallStackSize.java	Wed Sep  7 16:15:34 2016
+++ new/jdk/test/tools/launcher/TooSmallStackSize.java	Wed Sep  7 16:15:32 2016
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -35,6 +35,10 @@
  * stack size for the platform (as provided by the JVM error message when a very
  * small stack is used), and then verify that the JVM can be launched with that stack
  * size without a crash or any error messages.
+ *
+ * Note: This repo's version of the test uses the '-Xss' option. The
+ * hotspot repo's version of the test uses the '-XX:ThreadStackSize=n'
+ * VM option.
  */
 
 public class TooSmallStackSize extends TestHelper {
@@ -59,7 +63,7 @@
     static String getMinStackAllowed(TestResult tr) {
         /*
          * The JVM output will contain in one of the lines:
-         *   "The stack size specified is too small, Specify at least 100k"
+         *   "The Java thread stack size specified is too small. Specify at least 100k"
          * Although the actual size will vary. We need to extract this size
          * string from the output and return it.
          */
@@ -96,7 +100,7 @@
             System.out.println("PASSED: got no error message with stack size of " + stackSize);
             min_stack_allowed = stackSize;
         } else {
-            if (tr.contains("The stack size specified is too small")) {
+            if (tr.contains("The Java thread stack size specified is too small")) {
                 System.out.println("PASSED: got expected error message with stack size of " + stackSize);
                 min_stack_allowed = getMinStackAllowed(tr);
             } else {