Merge pull request #6442 from vespa-engine/balder/add-reorder-fence

Add a reorder fence.

1 files changed, 1 insertions, 0 deletions

diff --git a/searchlib/src/vespa/searchlib/common/bitvector.h b/searchlib/src/vespa/searchlib/common/bitvector.h
index 298528d0846..7405688f4f7 100644
--- a/searchlib/src/vespa/searchlib/common/bitvector.h
+++ b/searchlib/src/vespa/searchlib/common/bitvector.h
@@ -121,6 +121,7 @@ public:
 
     void setSize(Index sz) {
         setBit(sz);  // Need to place the new stop sign first
+        std::atomic_thread_fence(std::memory_order_release);
         if (sz > _sz) {
             // Can only remove the old stopsign if it is ahead of the new.
             clearBit(_sz);