diff mbox series

[v2,09/10] exfat: do not sync parent dir if just update timestamp

Message ID PUZPR04MB6316DC6F496F802C9BE779D8819EA@PUZPR04MB6316.apcprd04.prod.outlook.com (mailing list archive)
State New, archived
Headers show
Series exfat: improve sync dentry | expand

Commit Message

Yuezhang.Mo@sony.com Dec. 28, 2023, 7:06 a.m. UTC 
When sync or dir_sync is enabled, there is no need to sync the
parent directory's inode if only for updating its timestamp.

1. If an unexpected power failure occurs, the timestamp of the
   parent directory is not updated to the storage, which has no
   impact on the user.

2. The number of writes will be greatly reduced, which can not
   only improve performance, but also prolong device life.

Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
---
 fs/exfat/namei.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index 79e3fc9d6e19..b33497845a06 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -547,6 +547,7 @@  static int exfat_create(struct mnt_idmap *idmap, struct inode *dir,
 	struct exfat_dir_entry info;
 	loff_t i_pos;
 	int err;
+	loff_t size = i_size_read(dir);
 
 	mutex_lock(&EXFAT_SB(sb)->s_lock);
 	exfat_set_volume_dirty(sb);
@@ -557,7 +558,7 @@  static int exfat_create(struct mnt_idmap *idmap, struct inode *dir,
 
 	inode_inc_iversion(dir);
 	inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
-	if (IS_DIRSYNC(dir))
+	if (IS_DIRSYNC(dir) && size != i_size_read(dir))
 		exfat_sync_inode(dir);
 	else
 		mark_inode_dirty(dir);
@@ -801,10 +802,7 @@  static int exfat_unlink(struct inode *dir, struct dentry *dentry)
 	inode_inc_iversion(dir);
 	simple_inode_init_ts(dir);
 	exfat_truncate_inode_atime(dir);
-	if (IS_DIRSYNC(dir))
-		exfat_sync_inode(dir);
-	else
-		mark_inode_dirty(dir);
+	mark_inode_dirty(dir);
 
 	clear_nlink(inode);
 	simple_inode_init_ts(inode);
@@ -825,6 +823,7 @@  static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir,
 	struct exfat_chain cdir;
 	loff_t i_pos;
 	int err;
+	loff_t size = i_size_read(dir);
 
 	mutex_lock(&EXFAT_SB(sb)->s_lock);
 	exfat_set_volume_dirty(sb);
@@ -835,7 +834,7 @@  static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir,
 
 	inode_inc_iversion(dir);
 	inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
-	if (IS_DIRSYNC(dir))
+	if (IS_DIRSYNC(dir) && size != i_size_read(dir))
 		exfat_sync_inode(dir);
 	else
 		mark_inode_dirty(dir);
@@ -1239,6 +1238,7 @@  static int exfat_rename(struct mnt_idmap *idmap,
 	struct super_block *sb = old_dir->i_sb;
 	loff_t i_pos;
 	int err;
+	loff_t size = i_size_read(new_dir);
 
 	/*
 	 * The VFS already checks for existence, so for local filesystems
@@ -1260,7 +1260,7 @@  static int exfat_rename(struct mnt_idmap *idmap,
 	simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
 	EXFAT_I(new_dir)->i_crtime = current_time(new_dir);
 	exfat_truncate_inode_atime(new_dir);
-	if (IS_DIRSYNC(new_dir))
+	if (IS_DIRSYNC(new_dir) && size != i_size_read(new_dir))
 		exfat_sync_inode(new_dir);
 	else
 		mark_inode_dirty(new_dir);
@@ -1281,10 +1281,7 @@  static int exfat_rename(struct mnt_idmap *idmap,
 	}
 
 	inode_inc_iversion(old_dir);
-	if (IS_DIRSYNC(old_dir))
-		exfat_sync_inode(old_dir);
-	else
-		mark_inode_dirty(old_dir);
+	mark_inode_dirty(old_dir);
 
 	if (new_inode) {
 		exfat_unhash_inode(new_inode);