Ok, got it.
Thanks, :)
2013-11-20 (수), 17:48 +0800, Gu Zheng:
> Hi Kim,
> On 11/20/2013 09:31 AM, Jaegeuk Kim wrote:
>
> > 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.
>
> Yes, you're right.
>
> > What is your opinion?
>
> Moving the list_head initialization into the lock protection region, so
> that we can ignore the list change during the gap(initialization<-->use).
> And on the other side, it can keep the code style uniform for better
> maintenance.
>
> Regards,
> Gu
>
> >
> > 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;
> >
>
>
> --
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--
Jaegeuk Kim
Samsung
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