diff options
| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-04-25 16:05:51 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-04-29 11:19:21 +0900 |
| commit | 55008d845d233396ed374473da4613cee691aa03 (patch) | |
| tree | f869d0a791bee739b31714a49b8d8e092de44bf6 /fs/f2fs/f2fs.h | |
| parent | d70b4f53b950676228297f0b204f2e1512c1ff6c (diff) | |
| download | linux-55008d845d233396ed374473da4613cee691aa03.tar.bz2 | |
f2fs: enhance alloc_nid and build_free_nids flows
In order to avoid build_free_nid lock contention, let's change the order of
function calls as follows.
At first, check whether there is enough free nids.
- If available, just get a free nid with spin_lock without any overhead.
- Otherwise, conduct build_free_nids.
: scan nat pages, journal nat entries, and nat cache entries.
We should consider carefullly not to serve free nids intermediately made by
build_free_nids.
We can get stable free nids only after build_free_nids is done.
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 6283c8d77c2e..20aab02f2a42 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -190,7 +190,6 @@ static inline void set_raw_extent(struct extent_info *ext, struct f2fs_nm_info { block_t nat_blkaddr; /* base disk address of NAT */ nid_t max_nid; /* maximum possible node ids */ - nid_t init_scan_nid; /* the first nid to be scanned */ nid_t next_scan_nid; /* the next nid to be scanned */ /* NAT cache management */ @@ -360,6 +359,7 @@ struct f2fs_sb_info { struct mutex writepages; /* mutex for writepages() */ unsigned char next_lock_num; /* round-robin global locks */ int por_doing; /* recovery is doing or not */ + int on_build_free_nids; /* build_free_nids is doing */ /* for orphan inode management */ struct list_head orphan_inode_list; /* orphan inode list */ |