--- a/src/os/linux/vm/os_linux.cpp	Tue Mar 05 21:58:51 2013 +0100
+++ b/src/os/linux/vm/os_linux.cpp	Tue Mar 05 23:44:54 2013 +0100
@@ -1155,13 +1155,9 @@
   //   for initial thread if its stack size exceeds 6M. Cap it at 2M,
   //   in case other parts in glibc still assumes 2M max stack size.
   // FIXME: alt signal stack is gone, maybe we can relax this constraint?
-#ifndef IA64
-  if (stack_size > 2 * K * K) stack_size = 2 * K * K;
-#else
   // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small
-  if (stack_size > 4 * K * K) stack_size = 4 * K * K;
-#endif
-
+  if (stack_size > 2 * K * K IA64_ONLY(*2))
+      stack_size = 2 * K * K IA64_ONLY(*2);
   // Try to figure out where the stack base (top) is. This is harder.
   //
   // When an application is started, glibc saves the initial stack pointer in
@@ -3657,14 +3653,9 @@
 
 void signalHandler(int sig, siginfo_t* info, void* uc) {
   assert(info != NULL && uc != NULL, "it must be old kernel");
-  ResourceMark rm;
-  if (TraceSignals) {
-    tty->print_cr(err_msg("signal received: code=%d errno=%d signo=%d thread=%s address=%x", info->si_code, info->si_errno, info->si_signo, Thread::current()->name(), info->si_addr));
-  }
+  int orig_errno = errno;  // Preserve errno value over signal handler.
   JVM_handle_linux_signal(sig, info, uc, true);
-  if (TraceSignals) {
-    tty->print_cr("signal handled");
-  }
+  errno = orig_errno;
 }
 
 
@@ -4374,16 +4365,12 @@
    if (is_NPTL()) {
       return pthread_cond_timedwait(_cond, _mutex, _abstime);
    } else {
-#ifndef IA64
       // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control
       // word back to default 64bit precision if condvar is signaled. Java
       // wants 53bit precision.  Save and restore current value.
       int fpu = get_fpu_control_word();
-#endif // IA64
       int status = pthread_cond_timedwait(_cond, _mutex, _abstime);
-#ifndef IA64
       set_fpu_control_word(fpu);
-#endif // IA64
       return status;
    }
 }
@@ -4756,49 +4743,26 @@
 //
 
 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
-  static bool proc_pid_cpu_avail = true;
   static bool proc_task_unchecked = true;
   static const char *proc_stat_path = "/proc/%d/stat";
   pid_t  tid = thread->osthread()->thread_id();
-  int i;
   char *s;
   char stat[2048];
   int statlen;
   char proc_name[64];
   int count;
   long sys_time, user_time;
-  char string[64];
   char cdummy;
   int idummy;
   long ldummy;
   FILE *fp;
 
-  // We first try accessing /proc/<pid>/cpu since this is faster to
-  // process.  If this file is not present (linux kernels 2.5 and above)
-  // then we open /proc/<pid>/stat.
-  if ( proc_pid_cpu_avail ) {
-    sprintf(proc_name, "/proc/%d/cpu", tid);
-    fp =  fopen(proc_name, "r");
-    if ( fp != NULL ) {
-      count = fscanf( fp, "%s %lu %lu\n", string, &user_time, &sys_time);
-      fclose(fp);
-      if ( count != 3 ) return -1;
-
-      if (user_sys_cpu_time) {
-        return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec);
-      } else {
-        return (jlong)user_time * (1000000000 / clock_tics_per_sec);
-      }
-    }
-    else proc_pid_cpu_avail = false;
-  }
-
   // The /proc/<tid>/stat aggregates per-process usage on
   // new Linux kernels 2.6+ where NPTL is supported.
   // The /proc/self/task/<tid>/stat still has the per-thread usage.
   // See bug 6328462.
-  // There can be no directory /proc/self/task on kernels 2.4 with NPTL
-  // and possibly in some other cases, so we check its availability.
+  // There possibly can be cases where there is no directory
+  // /proc/self/task, so we check its availability.
   if (proc_task_unchecked && os::Linux::is_NPTL()) {
     // This is executed only once
     proc_task_unchecked = false;
@@ -4823,7 +4787,6 @@
   // We don't really need to know the command string, just find the last
   // occurrence of ")" and then start parsing from there. See bug 4726580.
   s = strrchr(stat, ')');
-  i = 0;
   if (s == NULL ) return -1;
 
   // Skip blank chars