Module Name: src
Committed By: yamt
Date: Wed Jun 10 01:56:35 UTC 2009
Modified Files:
src/sys/kern: sys_descrip.c
Log Message:
do_posix_fadvise: on POSIX_FADV_WILLNEED, start prefeching of object's pages.
To generate a diff of this commit:
cvs rdiff -u -r1.14 -r1.15 src/sys/kern/sys_descrip.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/kern/sys_descrip.c
diff -u src/sys/kern/sys_descrip.c:1.14 src/sys/kern/sys_descrip.c:1.15
--- src/sys/kern/sys_descrip.c:1.14 Sun May 31 22:15:13 2009
+++ src/sys/kern/sys_descrip.c Wed Jun 10 01:56:34 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: sys_descrip.c,v 1.14 2009/05/31 22:15:13 yamt Exp $ */
+/* $NetBSD: sys_descrip.c,v 1.15 2009/06/10 01:56:34 yamt Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_descrip.c,v 1.14 2009/05/31 22:15:13 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_descrip.c,v 1.15 2009/06/10 01:56:34 yamt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -94,6 +94,8 @@
#include <sys/mount.h>
#include <sys/syscallargs.h>
+#include <uvm/uvm_readahead.h>
+
/*
* Duplicate a file descriptor.
*/
@@ -613,6 +615,7 @@
do_posix_fadvise(int fd, off_t offset, off_t len, int advice)
{
file_t *fp;
+ vnode_t *vp;
int error;
CTASSERT(POSIX_FADV_NORMAL == UVM_ADV_NORMAL);
CTASSERT(POSIX_FADV_RANDOM == UVM_ADV_RANDOM);
@@ -647,6 +650,11 @@
break;
case POSIX_FADV_WILLNEED:
+ vp = fp->f_data;
+ error = uvm_readahead(&vp->v_uobj, offset,
+ len != 0 ? len : INT64_MAX - offset);
+ break;
+
case POSIX_FADV_DONTNEED:
case POSIX_FADV_NOREUSE:
/* Not implemented yet. */
