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authorChao Yu <chao2.yu@samsung.com>2015-09-30 17:38:48 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2015-10-09 16:20:55 -0700
commit5b7ee374144f8ef2db3e25d0d59a8ad83bb3cf33 (patch)
tree2262b10a4e6164f1ab375487e98ec21087bc39b1 /fs/f2fs
parent39307a8e2459ecdee9f1bc0b8a5d7af4a6d8f754 (diff)
downloadop-kernel-dev-5b7ee374144f8ef2db3e25d0d59a8ad83bb3cf33.zip
op-kernel-dev-5b7ee374144f8ef2db3e25d0d59a8ad83bb3cf33.tar.gz
f2fs: use atomic64_t for extent cache hit stat
Our hit stat of extent cache will increase all the time until remount, and we use atomic_t type for the stat variable, so it may easily incur overflow when we query extent cache frequently in a long time running fs. So to avoid that, this patch uses atomic64_t for hit stat variables. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/debug.c22
-rw-r--r--fs/f2fs/f2fs.h19
2 files changed, 21 insertions, 20 deletions
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 615a307..478e5d5 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -33,11 +33,11 @@ static void update_general_status(struct f2fs_sb_info *sbi)
int i;
/* validation check of the segment numbers */
- si->hit_largest = atomic_read(&sbi->read_hit_largest);
- si->hit_cached = atomic_read(&sbi->read_hit_cached);
- si->hit_rbtree = atomic_read(&sbi->read_hit_rbtree);
+ si->hit_largest = atomic64_read(&sbi->read_hit_largest);
+ si->hit_cached = atomic64_read(&sbi->read_hit_cached);
+ si->hit_rbtree = atomic64_read(&sbi->read_hit_rbtree);
si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree;
- si->total_ext = atomic_read(&sbi->total_hit_ext);
+ si->total_ext = atomic64_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);
@@ -283,12 +283,12 @@ static int stat_show(struct seq_file *s, void *v)
seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks,
si->bg_node_blks);
seq_puts(s, "\nExtent Cache:\n");
- seq_printf(s, " - Hit Count: L1-1:%d L1-2:%d L2:%d\n",
+ seq_printf(s, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",
si->hit_largest, si->hit_cached,
si->hit_rbtree);
- seq_printf(s, " - Hit Ratio: %d%% (%d / %d)\n",
+ seq_printf(s, " - Hit Ratio: %llu%% (%llu / %llu)\n",
!si->total_ext ? 0 :
- (si->hit_total * 100) / si->total_ext,
+ div64_u64(si->hit_total * 100, si->total_ext),
si->hit_total, si->total_ext);
seq_printf(s, " - Inner Struct Count: tree: %d, node: %d\n",
si->ext_tree, si->ext_node);
@@ -378,10 +378,10 @@ 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_rbtree, 0);
- atomic_set(&sbi->read_hit_largest, 0);
- atomic_set(&sbi->read_hit_cached, 0);
+ atomic64_set(&sbi->total_hit_ext, 0);
+ atomic64_set(&sbi->read_hit_rbtree, 0);
+ atomic64_set(&sbi->read_hit_largest, 0);
+ atomic64_set(&sbi->read_hit_cached, 0);
atomic_set(&sbi->inline_xattr, 0);
atomic_set(&sbi->inline_inode, 0);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 6f27b92..1fa0555 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -795,10 +795,10 @@ 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 */
- atomic_t total_hit_ext; /* # of lookup extent cache */
- atomic_t read_hit_rbtree; /* # of hit rbtree extent node */
- atomic_t read_hit_largest; /* # of hit largest extent node */
- atomic_t read_hit_cached; /* # of hit cached extent node */
+ atomic64_t total_hit_ext; /* # of lookup extent cache */
+ atomic64_t read_hit_rbtree; /* # of hit rbtree extent node */
+ atomic64_t read_hit_largest; /* # of hit largest extent node */
+ atomic64_t read_hit_cached; /* # of hit cached extent node */
atomic_t inline_xattr; /* # of inline_xattr inodes */
atomic_t inline_inode; /* # of inline_data inodes */
atomic_t inline_dir; /* # of inline_dentry inodes */
@@ -1848,7 +1848,8 @@ struct f2fs_stat_info {
struct f2fs_sb_info *sbi;
int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
int main_area_segs, main_area_sections, main_area_zones;
- int hit_largest, hit_cached, hit_rbtree, hit_total, total_ext;
+ unsigned long long hit_largest, hit_cached, hit_rbtree;
+ unsigned long long hit_total, total_ext;
int ext_tree, ext_node;
int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
int nats, dirty_nats, sits, dirty_sits, fnids;
@@ -1885,10 +1886,10 @@ 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(sbi) (atomic_inc(&(sbi)->total_hit_ext))
-#define stat_inc_rbtree_node_hit(sbi) (atomic_inc(&(sbi)->read_hit_rbtree))
-#define stat_inc_largest_node_hit(sbi) (atomic_inc(&(sbi)->read_hit_largest))
-#define stat_inc_cached_node_hit(sbi) (atomic_inc(&(sbi)->read_hit_cached))
+#define stat_inc_total_hit(sbi) (atomic64_inc(&(sbi)->total_hit_ext))
+#define stat_inc_rbtree_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_rbtree))
+#define stat_inc_largest_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_largest))
+#define stat_inc_cached_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_cached))
#define stat_inc_inline_xattr(inode) \
do { \
if (f2fs_has_inline_xattr(inode)) \
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