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f2fs: add largest/cached stat in extent cache

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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>
This commit is contained in:
Chao Yu
2015-08-19 19:12:20 +08:00
committed by Jaegeuk Kim
parent e2b4e2bc88
commit 91c481fff9
3 changed files with 23 additions and 8 deletions
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14
fs/f2fs/extent_cache.c
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@@ -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)