src/os/linux/vm/os_linux.cpp

rev 8362 : CMS fence eliding using fancy synchronization when using UseCondCardMark

*** 4857,4866 ****
--- 4857,4872 ----
    prio_init();
  
    return JNI_OK;
  }
  
+ void *os::alloc_memory_serialize_page() {
+   address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+   guarantee(mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page");
+   return mem_serialize_page;
+ }
+ 
  // Mark the polling page as unreadable
  void os::make_polling_page_unreadable(void) {
    if (!guard_memory((char*)_polling_page, Linux::page_size())) {
      fatal("Could not disable polling page");
    }