linux-kernel - [PATCH 3.18 013/108] f2fs: move dir data flush to write checkpoint process

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Message-Id: <20190218133520.120476263@linuxfoundation.org>
Date:   Mon, 18 Feb 2019 14:43:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yunlei He <heyunlei@...wei.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 3.18 013/108] f2fs: move dir data flush to write checkpoint process

3.18-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@...wei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/f2fs/file.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 8e68bb64f835..c4ba75acc6e2 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -153,6 +153,9 @@ 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