Previously, the bit field left 31 bits unused. By reducing the size
of wire_count by one bit, the size of the whole struct is reduced by
four bytes.
* vm/vm_page.h (struct vm_page): Reduce the size of wire_count to 15
bits.
---
vm/vm_page.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/vm/vm_page.h b/vm/vm_page.h
index 339d355..4fe1b41 100644
--- a/vm/vm_page.h
+++ b/vm/vm_page.h
@@ -84,7 +84,7 @@ struct vm_page {
vm_object_t object; /* which object am I in (O,P) */
vm_offset_t offset; /* offset into that object (O,P) */
- unsigned int wire_count:16, /* how many wired down maps use me?
+ unsigned int wire_count:15, /* how many wired down maps use me?
(O&P) */
/* boolean_t */ inactive:1, /* page is in inactive list (P) */
active:1, /* page is in active list (P) */
--
1.8.5.2
