src/hotspot/share/runtime/mutex.cpp

*** 368,382 ****
      if ((Probes & 0x7) == 0) {
        Delay = ((Delay << 1)|1) & 0x7FF;
        // CONSIDER: Delay += 1 + (Delay/4); Delay &= 0x7FF ;
      }
  
-     // Consider checking _owner's schedctl state, if OFFPROC abort spin.
-     // If the owner is OFFPROC then it's unlike that the lock will be dropped
-     // in a timely fashion, which suggests that spinning would not be fruitful
-     // or profitable.
- 
      // Stall for "Delay" time units - iterations in the current implementation.
      // Avoid generating coherency traffic while stalled.
      // Possible ways to delay:
      //   PAUSE, SLEEP, MEMBAR #sync, MEMBAR #halt,
      //   wr %g0,%asi, gethrtime, rdstick, rdtick, rdtsc, etc. ...
--- 368,377 ----
*** 551,561 ****
    // Slow-path exit - this thread must ensure succession and progress.
    // OnDeck serves as lock to protect cxq and EntryList.
    // Only the holder of OnDeck can manipulate EntryList or detach the RATs from cxq.
    // Avoid ABA - allow multiple concurrent producers (enqueue via push-CAS)
    // but only one concurrent consumer (detacher of RATs).
-   // Consider protecting this critical section with schedctl on Solaris.
    // Unlike a normal lock, however, the exiting thread "locks" OnDeck,
    // picks a successor and marks that thread as OnDeck.  That successor
    // thread will then clear OnDeck once it eventually acquires the outer lock.
    if (!Atomic::replace_if_null((ParkEvent*)_LBIT, &_OnDeck)) {
      return;
--- 546,555 ----