Run with kalloc_memset = 1 but skip kalloc_memset for large regions

769c3a47 · Silas Boyd-Wickizer · dec78d83 · 769c3a47
--- a/kalloc.c
+++ b/kalloc.c
@@ -31,7 +31,7 @@ static struct kmem slabmem[][NCPU] = {

 extern char end[]; // first address after kernel loaded from ELF file
 char *newend;
-enum { kalloc_memset = 0 };
+enum { kalloc_memset = 1 };

 static int kinited __mpalign__;

@@ -136,7 +136,7 @@ kfree_pool(struct kmem *m, char *v)
    panic("kfree_pool: unknown region %p", v);

  // Fill with junk to catch dangling refs.
-  if (kinited && kalloc_memset)
+  if (kinited && kalloc_memset && m->size <= 16384)
    memset(v, 1, m->size);

  acquire(&m->lock);
@@ -188,7 +188,7 @@ kmemalloc(struct kmem *km)

  mtlabel(mtrace_label_block, r, m->size, "kalloc", sizeof("kalloc"));

-  if (kalloc_memset)
+  if (kalloc_memset && m->size <= 16384)
    memset(r, 2, m->size);
  return (char*)r;
 }