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| author | Chao Yu <chao2.yu@samsung.com> | 2015-08-19 19:12:20 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-08-21 22:45:15 -0700 |
| commit | 91c481fff92c705dd382f1f53c01e6b6b88507d0 (patch) | |
| tree | 5a4192bcf89ce525bd9992cf879c16f886acf035 /fs/f2fs/extent_cache.c | |
| parent | e2b4e2bc8865e03eecd49caa9713a2402a96bba9 (diff) | |
| download | linux-91c481fff92c705dd382f1f53c01e6b6b88507d0.tar.gz linux-91c481fff92c705dd382f1f53c01e6b6b88507d0.tar.bz2 linux-91c481fff92c705dd382f1f53c01e6b6b88507d0.zip | |
f2fs: add largest/cached stat in extent cache
This patch adds to stat the hit count of largest/cached node for showing
in debugfs.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/extent_cache.c')
| -rw-r--r-- | fs/f2fs/extent_cache.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index cea581353bc2..5cf217faed1f 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -81,8 +81,8 @@ static struct extent_tree *__grab_extent_tree(struct inode *inode) return et; } -static struct extent_node *__lookup_extent_tree(struct extent_tree *et, - unsigned int fofs) +static struct extent_node *__lookup_extent_tree(struct f2fs_sb_info *sbi, + struct extent_tree *et, unsigned int fofs) { struct rb_node *node = et->root.rb_node; struct extent_node *en = et->cached_en; @@ -90,8 +90,10 @@ static struct extent_node *__lookup_extent_tree(struct extent_tree *et, if (en) { struct extent_info *cei = &en->ei; - if (cei->fofs <= fofs && cei->fofs + cei->len > fofs) + if (cei->fofs <= fofs && cei->fofs + cei->len > fofs) { + stat_inc_cached_node_hit(sbi); return en; + } } while (node) { @@ -280,10 +282,11 @@ static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, *ei = et->largest; ret = true; stat_inc_read_hit(sbi); + stat_inc_largest_node_hit(sbi); goto out; } - en = __lookup_extent_tree(et, pgofs); + en = __lookup_extent_tree(sbi, et, pgofs); if (en) { *ei = en->ei; spin_lock(&sbi->extent_lock); @@ -313,7 +316,8 @@ out: * tree must stay unchanged between lookup and insertion. */ static struct extent_node *__lookup_extent_tree_ret(struct extent_tree *et, - unsigned int fofs, struct extent_node **prev_ex, + unsigned int fofs, + struct extent_node **prev_ex, struct extent_node **next_ex, struct rb_node ***insert_p, struct rb_node **insert_parent) |