vm: object: add prefetch function to fetch missing pages

2026-04-30 19:09:41 +01:00
parent 607efa961f
commit d63c2dbd12
3 changed files with 78 additions and 9 deletions
@@ -98,6 +98,16 @@ extern kern_status_t vm_object_attach_cow(
 	struct vm_object *vmo,
 	unsigned long *irq_flags);

+/* prefetch any missing pages in the specified range of a vm-object.
+ * any lazy-allocated pages will be allocated.
+ * any missing pages will be requested from the vm-controller, if one is
+ * attached. */
+extern kern_status_t vm_object_prefetch(
+	struct vm_object *vo,
+	off_t offset,
+	size_t length,
+	unsigned long *irq_flags);
+
 extern struct vm_page *vm_object_get_page(
 	struct vm_object *vo,
 	off_t offset,