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udf: Add readpages support for udf. 

Use mpage_readpages() instead of multiple calls to udf_readpage() to reduce the
CPU utilization and make performance higher.

Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Namjae Jeon 2011-10-03 14:02:59 +09:00 committed by Jan Kara
parent 3ee77f2091
commit bc1123239a
1 changed files with 9 additions and 1 deletions
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10
fs/udf/inode.c
View File

@ -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,