Debug code to check that zalloc is returning zeroed pages

fe9d6c9d · Austin Clements · c11e2ec0 · fe9d6c9d
--- a/kernel/zalloc.cc
+++ b/kernel/zalloc.cc
@@ -82,6 +82,9 @@ zallocator::alloc(const char* name)
  } else {
    // Zero the run header used by kmem
    memset(p, 0, sizeof(struct run));
+    if (0)
+      for (int i = 0; i < PGSIZE; i++)
+        assert(p[i] == 0);
  }
  tryrefill();
  return p;