[PATCH 4.4 017/143] f2fs: move dir data flush to write checkpoint process

From: Greg Kroah-Hartman
Date: Mon Feb 18 2019 - 09:02:50 EST


4.4-stable review patch. If anyone has any objections, please let me know.

------------------

[ Upstream commit b61ac5b720146c619c7cdf17eff2551b934399e5 ]

This patch move dir data flush to write checkpoint process, by
doing this, it may reduce some time for dir fsync.

pre:
-f2fs_do_sync_file enter
-file_write_and_wait_range <- flush & wait
-write_checkpoint
-do_checkpoint <- wait all
-f2fs_do_sync_file exit

now:
-f2fs_do_sync_file enter
-write_checkpoint
-block_operations <- flush dir & no wait
-do_checkpoint <- wait all
-f2fs_do_sync_file exit

Signed-off-by: Yunlei He <heyunlei@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/f2fs/file.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 96bfd9f0ea02..bee3bc7a16ac 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -200,6 +200,9 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)

trace_f2fs_sync_file_enter(inode);

+ if (S_ISDIR(inode->i_mode))
+ goto go_write;
+
/* if fdatasync is triggered, let's do in-place-update */
if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
set_inode_flag(fi, FI_NEED_IPU);
--
2.19.1