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8144052: mark_card_deferred does not need to check g1_young_gen

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Reviewed-by: tschatzl, mgerdin
This commit is contained in:
Erik Helin 2015-11-27 13:39:45 +01:00
parent 34d5bd8db1
commit 86d5c93087
2 changed files with 1 additions and 6 deletions
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2
hotspot/src/share/vm/gc/g1/g1ParScanThreadState.hpp
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@ -101,7 +101,7 @@ class G1ParScanThreadState : public CHeapObj<mtGC> {
template <class T> void update_rs(HeapRegion* from, T* p) {
// If the new value of the field points to the same region or
// is the to-space, we don't need to include it in the Rset updates.
if (!from->is_in_reserved(oopDesc::load_decode_heap_oop(p)) && !from->is_survivor()) {
if (!from->is_in_reserved(oopDesc::load_decode_heap_oop(p)) && !from->is_young()) {
size_t card_index = ctbs()->index_for(p);
// If the card hasn't been added to the buffer, do it.
if (ctbs()->mark_card_deferred(card_index)) {

5
hotspot/src/share/vm/gc/g1/g1SATBCardTableModRefBS.cpp
View File

@ -85,11 +85,6 @@ bool G1SATBCardTableModRefBS::mark_card_deferred(size_t card_index) {
return false;
}
if (val == g1_young_gen) {
// the card is for a young gen region. We don't need to keep track of all pointers into young
return false;
}
// Cached bit can be installed either on a clean card or on a claimed card.
jbyte new_val = val;
if (val == clean_card_val()) {