6819065: G1: eliminate high serial card table clearing time

Reviewed-by: iveresov, tonyp

1 files changed, 5 insertions, 0 deletions

diff --git a/src/share/vm/gc_implementation/g1/g1RemSet.cpp b/src/share/vm/gc_implementation/g1/g1RemSet.cpp
index b6cf7d794..86a39a7f0 100644
--- a/src/share/vm/gc_implementation/g1/g1RemSet.cpp
+++ b/src/share/vm/gc_implementation/g1/g1RemSet.cpp
@@ -219,6 +219,7 @@ public:
     HeapRegionRemSet* hrrs = r->rem_set();
     if (hrrs->iter_is_complete()) return false; // All done.
     if (!_try_claimed && !hrrs->claim_iter()) return false;
+    _g1h->push_dirty_cards_region(r);
     // If we didn't return above, then
     //   _try_claimed || r->claim_iter()
     // is true: either we're supposed to work on claimed-but-not-complete
@@ -242,6 +243,10 @@ public:
       assert(card_region != NULL, "Yielding cards not in the heap?");
       _cards++;
 
+      if (!card_region->is_on_dirty_cards_region_list()) {
+        _g1h->push_dirty_cards_region(card_region);
+      }
+
        // If the card is dirty, then we will scan it during updateRS.
       if (!card_region->in_collection_set() && !_ct_bs->is_card_dirty(card_index)) {
           if (!_ct_bs->is_card_claimed(card_index) && _ct_bs->claim_card(card_index)) {