Module Name: src
Committed By: yamt
Date: Fri Apr 8 10:38:36 UTC 2011
Modified Files:
src/sys/uvm: uvm_map.c
Log Message:
comment
To generate a diff of this commit:
cvs rdiff -u -r1.295 -r1.296 src/sys/uvm/uvm_map.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/uvm/uvm_map.c
diff -u src/sys/uvm/uvm_map.c:1.295 src/sys/uvm/uvm_map.c:1.296
--- src/sys/uvm/uvm_map.c:1.295 Wed Feb 2 15:25:27 2011
+++ src/sys/uvm/uvm_map.c Fri Apr 8 10:38:36 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: uvm_map.c,v 1.295 2011/02/02 15:25:27 chuck Exp $ */
+/* $NetBSD: uvm_map.c,v 1.296 2011/04/08 10:38:36 yamt Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.295 2011/02/02 15:25:27 chuck Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.296 2011/04/08 10:38:36 yamt Exp $");
#include "opt_ddb.h"
#include "opt_uvmhist.h"
@@ -3398,11 +3398,12 @@
KASSERT(entry != &map->header);
KASSERT(start < entry->end);
/*
- * XXX IMPLEMENT ME.
- * Should invent a "weak" mode for uvm_fault()
- * which would only do the PGO_LOCKED pgo_get().
+ * For now, we handle only the easy but commonly-requested case.
+ * ie. start prefetching of backing uobj pages.
*
- * for now, we handle only the easy but common case.
+ * XXX It might be useful to pmap_enter() the already-in-core
+ * pages by inventing a "weak" mode for uvm_fault() which would
+ * only do the PGO_LOCKED pgo_get().
*/
if (UVM_ET_ISOBJ(entry) && amap == NULL && uobj != NULL) {
off_t offset;
