RFR: Backport of G1 sorted freelist

[Jesper Wilhelmsson]

Hi,

Would someone like to have a look at this backoprt of sorting the G1 freelist to 
8u. The patch from 9 applied with one minor rejection. The rejected chunk was

--- g1CollectedHeap.cpp
+++ g1CollectedHeap.cpp
@@ -5907,7 +5906,7 @@
      _cg1r->hot_card_cache()->reset_card_counts(hr);
    }
    hr->hr_clear(par, true /* clear_space */, locked /* locked */);
-  free_list->add_as_head(hr);
+  free_list->add_ordered(hr);
  }

  void G1CollectedHeap::free_humongous_region(HeapRegion* hr,


and the reason for it being rejected was that the line above the changed line 
now has one less argument:

5984     _cg1r->hot_card_cache()->reset_card_counts(hr);
5985   }
5986   hr->hr_clear(par, true /* clear_space */);
5987   free_list->add_as_head(hr);
5988 }
5989
5990 void G1CollectedHeap::free_humongous_region(HeapRegion* hr,


So I changed the line above manually.

Full 8u webrev: http://cr.openjdk.java.net/~jwilhelm/8036025/webrev.8u/
Final 9 webrev: http://cr.openjdk.java.net/~jwilhelm/8036025/webrev.4/

Thanks!
/Jesper