--- a/hotspot/src/share/vm/runtime/os.cpp Wed Jul 05 16:39:00 2017 +0200
+++ b/hotspot/src/share/vm/runtime/os.cpp Sat Jul 19 17:38:22 2008 -0400
@@ -922,8 +922,9 @@
// time and expensive page trap spinning, 'SerializePageLock' is used to block
// the mutator thread if such case is encountered. See bug 6546278 for details.
Thread::muxAcquire(&SerializePageLock, "serialize_thread_states");
- os::protect_memory( (char *)os::get_memory_serialize_page(), os::vm_page_size() );
- os::unguard_memory( (char *)os::get_memory_serialize_page(), os::vm_page_size() );
+ os::protect_memory((char *)os::get_memory_serialize_page(),
+ os::vm_page_size(), MEM_PROT_READ, /*is_committed*/true );
+ os::unguard_memory((char *)os::get_memory_serialize_page(), os::vm_page_size());
Thread::muxRelease(&SerializePageLock);
}