--- old/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp	2016-12-06 10:23:46.675846000 +0100
+++ new/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp	2016-12-06 10:23:46.528843000 +0100
@@ -681,8 +681,10 @@
 ///////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
-size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;
+// Minimum usable stack sizes required to get to user code. Space for
+// HotSpot guard pages is added later.
+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 = 128 * K;
 
 // return default stack size for thr_type