[PATCH 1/2] f2fs: avoid multiple node page writes due to inline_data

From: Jaegeuk Kim
Date: Sat Jan 23 2016 - 15:15:57 EST


The sceanrio is:
1. create fully node blocks
2. flush node blocks
3. write inline_data for all the node blocks again
4. flush node blocks redundantly

Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
fs/f2fs/data.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 8d0d9ec..011456e 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1622,14 +1622,22 @@ static int f2fs_write_end(struct file *file,

trace_f2fs_write_end(inode, pos, len, copied);

- set_page_dirty(page);
-
if (pos + copied > i_size_read(inode)) {
i_size_write(inode, pos + copied);
mark_inode_dirty(inode);
- update_inode_page(inode);
}

+ if (f2fs_has_inline_data(inode) &&
+ is_inode_flag_set(F2FS_I(inode), FI_DATA_EXIST)) {
+ int err = f2fs_write_inline_data(inode, page);
+ if (err)
+ set_page_dirty(page);
+ } else {
+ set_page_dirty(page);
+ }
+
+ f2fs_write_inode(inode, NULL);
+
f2fs_put_page(page, 1);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return copied;
--
2.6.3