Variables for recording extent cache ratio info were updated without protection, this patch tries to alter them to atomic_t type for more accurate stat.
Signed-off-by: Chao Yu <[email protected]> --- fs/f2fs/debug.c | 7 +++++-- fs/f2fs/extent_cache.c | 6 +++--- fs/f2fs/f2fs.h | 7 ++++--- 3 files changed, 12 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c index 2aeaf4e..bc215fd 100644 --- a/fs/f2fs/debug.c +++ b/fs/f2fs/debug.c @@ -33,8 +33,8 @@ static void update_general_status(struct f2fs_sb_info *sbi) int i; /* validation check of the segment numbers */ - si->hit_ext = sbi->read_hit_ext; - si->total_ext = sbi->total_hit_ext; + si->hit_ext = atomic_read(&sbi->read_hit_ext); + si->total_ext = atomic_read(&sbi->total_hit_ext); si->ext_tree = sbi->total_ext_tree; si->ext_node = atomic_read(&sbi->total_ext_node); si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES); @@ -369,6 +369,9 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi) si->sbi = sbi; sbi->stat_info = si; + atomic_set(&sbi->total_hit_ext, 0); + atomic_set(&sbi->read_hit_ext, 0); + atomic_set(&sbi->inline_xattr, 0); atomic_set(&sbi->inline_inode, 0); atomic_set(&sbi->inline_dir, 0); diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index 5f78fc1..362df8c 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -279,7 +279,7 @@ static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, et->largest.fofs + et->largest.len > pgofs) { *ei = et->largest; ret = true; - stat_inc_read_hit(sbi->sb); + stat_inc_read_hit(sbi); goto out; } @@ -292,10 +292,10 @@ static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, et->cached_en = en; spin_unlock(&sbi->extent_lock); ret = true; - stat_inc_read_hit(sbi->sb); + stat_inc_read_hit(sbi); } out: - stat_inc_total_hit(sbi->sb); + stat_inc_total_hit(sbi); read_unlock(&et->lock); trace_f2fs_lookup_extent_tree_end(inode, pgofs, ei); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index b18b852..38ba525 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -781,7 +781,8 @@ struct f2fs_sb_info { unsigned int segment_count[2]; /* # of allocated segments */ unsigned int block_count[2]; /* # of allocated blocks */ atomic_t inplace_count; /* # of inplace update */ - int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ + atomic_t total_hit_ext; /* # of lookup extent cache */ + atomic_t read_hit_ext; /* # of hit extent cache */ atomic_t inline_xattr; /* # of inline_xattr inodes */ atomic_t inline_inode; /* # of inline_data inodes */ atomic_t inline_dir; /* # of inline_dentry inodes */ @@ -1837,8 +1838,8 @@ static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++) #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++) #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--) -#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++) -#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++) +#define stat_inc_total_hit(sbi) (atomic_inc(&(sbi)->total_hit_ext)) +#define stat_inc_read_hit(sbi) (atomic_inc(&(sbi)->read_hit_ext)) #define stat_inc_inline_xattr(inode) \ do { \ if (f2fs_has_inline_xattr(inode)) \ -- 2.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
