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Message-Id: <1317618179-22176-1-git-send-email-linkinjeon@gmail.com>
Date: Mon, 3 Oct 2011 14:02:59 +0900
From: Namjae Jeon <linkinjeon@...il.com>
To: jack@...e.cz
Cc: linux-kernel@...r.kernel.org, Namjae Jeon <linkinjeon@...il.com>
Subject: [PATCH 2/2 v2] udf : add readpages support for udf.
Using mpage_readpages instead of multiple calls to udf_readpage to reduce the CPU utilization and make performance higher.
Signed-off-by: Namjae Jeon <linkinjeon@...il.com>
---
fs/udf/inode.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 58665ce..81f9ce1 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -37,6 +37,7 @@
#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/crc-itu-t.h>
+#include <linux/mpage.h>
#include "udf_i.h"
#include "udf_sb.h"
@@ -104,7 +105,13 @@ static int udf_writepage(struct page *page, struct writeback_control *wbc)
static int udf_readpage(struct file *file, struct page *page)
{
- return block_read_full_page(page, udf_get_block);
+ return mpage_readpage(page, udf_get_block);
+}
+
+static int udf_readpages(struct file *file, struct address_space *mapping,
+ struct list_head *pages, unsigned nr_pages)
+{
+ return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
}
static int udf_write_begin(struct file *file, struct address_space *mapping,
@@ -139,6 +146,7 @@ static sector_t udf_bmap(struct address_space *mapping, sector_t block)
const struct address_space_operations udf_aops = {
.readpage = udf_readpage,
+ .readpages = udf_readpages,
.writepage = udf_writepage,
.write_begin = udf_write_begin,
.write_end = generic_write_end,
--
1.7.4.4
--
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