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.f...@cn.fujitsu.com>
>> ---
>> 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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