Hi Gu,
IMO, there is no reason to cover the list header by the lock.
In any flows, sbi should have the header all the time.
What is your opinion?
Thanks,
2013-11-19 (화), 18:03 +0800, Gu Zheng:
> Signed-off-by: Gu Zheng <guz.fnst@xxxxxxxxxxxxxx>
> ---
> fs/f2fs/checkpoint.c | 15 ++++++++++-----
> 1 files changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index f884589..1de70cc 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -511,8 +511,8 @@ void add_dirty_dir_inode(struct inode *inode)
> void remove_dirty_dir_inode(struct inode *inode)
> {
> struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
> - struct list_head *head = &sbi->dir_inode_list;
> - struct list_head *this;
> +
> + struct list_head *this, *head;
>
> if (!S_ISDIR(inode->i_mode))
> return;
> @@ -523,6 +523,7 @@ void remove_dirty_dir_inode(struct inode *inode)
> return;
> }
>
> + head = &sbi->dir_inode_list;
> list_for_each(this, head) {
> struct dir_inode_entry *entry;
> entry = list_entry(this, struct dir_inode_entry, list);
> @@ -544,11 +545,13 @@ void remove_dirty_dir_inode(struct inode *inode)
>
> struct inode *check_dirty_dir_inode(struct f2fs_sb_info *sbi, nid_t ino)
> {
> - struct list_head *head = &sbi->dir_inode_list;
> - struct list_head *this;
> +
> + struct list_head *this, *head;
> struct inode *inode = NULL;
>
> spin_lock(&sbi->dir_inode_lock);
> +
> + head = &sbi->dir_inode_list;
> list_for_each(this, head) {
> struct dir_inode_entry *entry;
> entry = list_entry(this, struct dir_inode_entry, list);
> @@ -563,11 +566,13 @@ struct inode *check_dirty_dir_inode(struct f2fs_sb_info *sbi, nid_t ino)
>
> void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
> {
> - struct list_head *head = &sbi->dir_inode_list;
> + struct list_head *head;
> struct dir_inode_entry *entry;
> struct inode *inode;
> retry:
> spin_lock(&sbi->dir_inode_lock);
> +
> + head = &sbi->dir_inode_list;
> if (list_empty(head)) {
> spin_unlock(&sbi->dir_inode_lock);
> return;
--
Jaegeuk Kim
Samsung
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