diff --git a/common_components/heap/allocator/region_desc.h b/common_components/heap/allocator/region_desc.h
index 03dc5d1c015ce9b9d03e69c659bbdb0ed0245940..b99932a61b7157ae91396f1380f9ff8c21d2f920 100755
--- a/common_components/heap/allocator/region_desc.h
+++ b/common_components/heap/allocator/region_desc.h
@@ -440,13 +440,13 @@ public:
         FREE_REGION,
 
         THREAD_LOCAL_REGION,
-        THREAD_LOCAL_OLD_REGION,
         RECENT_FULL_REGION,
         FROM_REGION,
-        LONE_FROM_REGION,
         EXEMPTED_FROM_REGION,
+        LONE_FROM_REGION,
         TO_REGION,
         OLD_REGION,
+        THREAD_LOCAL_OLD_REGION,
 
         // pinned object will not be forwarded by concurrent copying gc.
         FULL_PINNED_REGION,
@@ -779,6 +779,14 @@ public:
         return type == RegionType::THREAD_LOCAL_REGION || type == RegionType::RECENT_FULL_REGION;
     }
 
+    bool IsInYoungSpaceForWB() const
+    {
+        RegionType type = GetRegionType();
+        return type == RegionType::THREAD_LOCAL_REGION ||
+                type == RegionType::RECENT_FULL_REGION ||
+                type == RegionType::FROM_REGION;
+    }
+
     bool IsInYoungSpace() const
     {
         RegionType type = GetRegionType();
diff --git a/common_components/heap/collector/region_rset.h b/common_components/heap/collector/region_rset.h
index 2d31593573e6b3ae80c4924d3b5c325ed1fca4ba..4ce2fcaab2ad4b7c78e7e1df2c79864944f4e315 100644
--- a/common_components/heap/collector/region_rset.h
+++ b/common_components/heap/collector/region_rset.h
@@ -63,7 +63,7 @@ public:
         size_t cardIdx = (offset / kMarkedBytesPerBit) / kBitsPerWord;
         size_t headMaskBitStart = (offset / kMarkedBytesPerBit) % kBitsPerWord;
         uint64_t headMaskBits = static_cast<uint64_t>(1) << headMaskBitStart;
-        uint64_t card = cardTable[cardIdx].load();
+        uint64_t card = cardTable[cardIdx].load(std::memory_order_relaxed);
         bool isMarked = ((card & headMaskBits) != 0);
         if (!isMarked) {
             card = cardTable[cardIdx].fetch_or(headMaskBits);
diff --git a/common_components/heap/w_collector/idle_barrier.cpp b/common_components/heap/w_collector/idle_barrier.cpp
index 4f23d406e8c354e1469c2481e297f02325192222..ba0c569a4fa9e98734fc98f94e2854658f202589 100755
--- a/common_components/heap/w_collector/idle_barrier.cpp
+++ b/common_components/heap/w_collector/idle_barrier.cpp
@@ -93,8 +93,7 @@ void IdleBarrier::UpdateRememberSet(BaseObject* object, BaseObject* ref) const
     ASSERT(object != nullptr);
     RegionDesc* objRegion = RegionDesc::GetRegionDescAt(reinterpret_cast<MAddress>((void*)object));
     RegionDesc* refRegion = RegionDesc::GetRegionDescAt(reinterpret_cast<MAddress>((void*)ref));
-    if ((!objRegion->IsInYoungSpace() && refRegion->IsInYoungSpace()) ||
-        (objRegion->IsInFromSpace() && refRegion->IsInRecentSpace())) {
+    if (!objRegion->IsInYoungSpaceForWB() && refRegion->IsInYoungSpaceForWB()) {
         if (objRegion->MarkRSetCardTable(object)) {
             DLOG(BARRIER, "update point-out remember set of region %p, obj %p, ref: %p<%p>",
                 objRegion, object, ref, ref->GetTypeInfo());