f2fs: add trace for rb-tree extent cache ops
This patch adds trace for lookup/update/shrink/destroy ops in rb-tree extent cache.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index acdc076..d7ff4ca 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -533,6 +533,8 @@
if (is_inode_flag_set(F2FS_I(inode), FI_NO_EXTENT))
return false;
+ trace_f2fs_lookup_extent_tree_start(inode, pgofs);
+
down_read(&sbi->extent_tree_lock);
et = radix_tree_lookup(&sbi->extent_tree_root, inode->i_ino);
if (!et) {
@@ -555,6 +557,8 @@
stat_inc_total_hit(sbi->sb);
read_unlock(&et->lock);
+ trace_f2fs_lookup_extent_tree_end(inode, pgofs, en);
+
atomic_dec(&et->refcount);
return en ? true : false;
}
@@ -573,6 +577,8 @@
if (is_inode_flag_set(F2FS_I(inode), FI_NO_EXTENT))
return;
+ trace_f2fs_update_extent_tree(inode, fofs, blkaddr);
+
down_write(&sbi->extent_tree_lock);
et = radix_tree_lookup(&sbi->extent_tree_root, ino);
if (!et) {
@@ -665,6 +671,7 @@
struct radix_tree_iter iter;
void **slot;
unsigned int found;
+ unsigned int node_cnt = 0, tree_cnt = 0;
if (!test_opt(sbi, EXTENT_CACHE))
return;
@@ -691,7 +698,7 @@
atomic_inc(&et->refcount);
write_lock(&et->lock);
- __free_extent_tree(sbi, et, false);
+ node_cnt += __free_extent_tree(sbi, et, false);
write_unlock(&et->lock);
atomic_dec(&et->refcount);
}
@@ -707,15 +714,19 @@
radix_tree_delete(&sbi->extent_tree_root, et->ino);
kmem_cache_free(extent_tree_slab, et);
sbi->total_ext_tree--;
+ tree_cnt++;
}
}
up_write(&sbi->extent_tree_lock);
+
+ trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt);
}
void f2fs_destroy_extent_tree(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct extent_tree *et;
+ unsigned int node_cnt = 0;
if (!test_opt(sbi, EXTENT_CACHE))
return;
@@ -731,7 +742,7 @@
/* free all extent info belong to this extent tree */
write_lock(&et->lock);
- __free_extent_tree(sbi, et, true);
+ node_cnt = __free_extent_tree(sbi, et, true);
write_unlock(&et->lock);
atomic_dec(&et->refcount);
@@ -749,6 +760,7 @@
sbi->total_ext_tree--;
up_write(&sbi->extent_tree_lock);
out:
+ trace_f2fs_destroy_extent_tree(inode, node_cnt);
return;
}