kmfree: unlabel before putting on free list

b87607db · Nickolai Zeldovich · 90465e87 · b87607db
--- a/kernel/kmalloc.cc
+++ b/kernel/kmalloc.cc
@@ -121,6 +121,8 @@ kmfree(void *ap, u64 nbytes)
  if (ALLOC_MEMSET)
    memset(ap, 3, (1<<b));

+  mtunlabel(mtrace_label_heap, ap);
+
  int c = mycpu()->id;
  for (;;) {
    auto headptr = freelists[c].buckets[b].load();
@@ -128,8 +130,6 @@ kmfree(void *ap, u64 nbytes)
    if (freelists[c].buckets[b].compare_exchange(headptr, h))
      break;
  }
-
-  mtunlabel(mtrace_label_heap, ap);
 }

 int