diff options
authorNamjae Jeon <linkinjeon@gmail.com>2012-08-31 12:49:07 -0400
committerJan Kara <jack@suse.cz>2012-09-04 00:06:26 +0200
commit378b8e1ad18e7c97832aa3771e295153c4cd2a55 (patch)
parentext3: don't clear orphan list on ro mount with errors (diff)
udf: add writepages support for udf
Use mpage_writepages() instead of multiple calls to udf_writepage() to make performance higher. *Write Speed with writepage() = RecSize ReadSpeed WriteSpeed RanReadSpeed RanWriteSpeed 10485760 0.00MB/sec 8.56MB/sec 0.00MB/sec 8.20MB/sec 1048576 0.00MB/sec 8.57MB/sec 0.00MB/sec 6.42MB/sec 524288 0.00MB/sec 8.59MB/sec 0.00MB/sec 5.24MB/sec 262144 0.00MB/sec 8.59MB/sec 0.00MB/sec 4.17MB/sec 131072 0.00MB/sec 8.53MB/sec 0.00MB/sec 3.32MB/sec 65536 0.00MB/sec 8.49MB/sec 0.00MB/sec 2.31MB/sec *Write Speed with writepages() RecSize ReadSpeed WriteSpeed RanReadSpeed RanWriteSpeed 10485760 0.00MB/sec 9.88MB/sec 0.00MB/sec 9.60MB/sec 1048576 0.00MB/sec 9.95MB/sec 0.00MB/sec 7.52MB/sec 524288 0.00MB/sec 9.98MB/sec 0.00MB/sec 6.16MB/sec 262144 0.00MB/sec 9.90MB/sec 0.00MB/sec 4.98MB/sec 131072 0.00MB/sec 9.89MB/sec 0.00MB/sec 3.78MB/sec 65536 0.00MB/sec 9.81MB/sec 0.00MB/sec 2.50MB/sec There is about 1.4MB/sec speed improvement over 8.5MB/sec, which comes out around 16% improvement. Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Ashish Sangwan <ashish.sangwan2@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index aa233469b3c1..1a0588e77a2f 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -100,6 +100,12 @@ static int udf_writepage(struct page *page, struct writeback_control *wbc)
return block_write_full_page(page, udf_get_block, wbc);
+static int udf_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+ return mpage_writepages(mapping, wbc, udf_get_block);
static int udf_readpage(struct file *file, struct page *page)
return mpage_readpage(page, udf_get_block);
@@ -145,6 +151,7 @@ const struct address_space_operations udf_aops = {
.readpage = udf_readpage,
.readpages = udf_readpages,
.writepage = udf_writepage,
+ .writepages = udf_writepages,
.write_begin = udf_write_begin,
.write_end = generic_write_end,
.bmap = udf_bmap,