1 files changed, 8 insertions, 1 deletions
diff --git a/src/runtime/mgcwork.go b/src/runtime/mgcwork.go
index 9c32ae8880..b7feb847b4 100644
--- a/src/runtime/mgcwork.go
+++ b/src/runtime/mgcwork.go
@@ -7,7 +7,7 @@ package runtime
 import "unsafe"
 
 const (
-	_Debugwbufs  = true    // if true check wbufs consistency
+	_Debugwbufs  = false   // if true check wbufs consistency
 	_WorkbufSize = 1 * 256 // in bytes - if small wbufs are passed to GC in a timely fashion.
 )
 
@@ -182,6 +182,13 @@ func (w *gcWork) balance() {
 	}
 }
 
+// empty returns true if w has no mark work available.
+//go:nowritebarrier
+func (w *gcWork) empty() bool {
+	wbuf := w.wbuf
+	return wbuf == 0 || wbuf.ptr().nobj == 0
+}
+
 // Internally, the GC work pool is kept in arrays in work buffers.
 // The gcWork interface caches a work buffer until full (or empty) to
 // avoid contending on the global work buffer lists.