f2fs: monitor the number of background checkpoint

This patch adds to show the number of background checkpoint.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

3 files changed, 6 insertions, 2 deletions

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index b73e8e133c8b..48f2ae9452ef 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -272,7 +272,8 @@ static int stat_show(struct seq_file *s, void *v)
                            si->dirty_count);
                 seq_printf(s, "  - Prefree: %d\n  - Free: %d (%d)\n\n",
                            si->prefree_count, si->free_segs, si->free_secs);
-                seq_printf(s, "CP calls: %d\n", si->cp_count);
+                seq_printf(s, "CP calls: %d (BG: %d)\n",
+                                si->cp_count, si->bg_cp_count);
                 seq_printf(s, "GC calls: %d (BG: %d)\n",
                            si->call_count, si->bg_gc);
                 seq_printf(s, "  - data segments : %d (%d)\n",
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 4331b9fe6f27..2c0e478cefb4 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1937,7 +1937,7 @@ struct f2fs_stat_info {
         int util_free, util_valid, util_invalid;
         int rsvd_segs, overp_segs;
         int dirty_count, node_pages, meta_pages;
-        int prefree_count, call_count, cp_count;
+        int prefree_count, call_count, cp_count, bg_cp_count;
         int tot_segs, node_segs, data_segs, free_segs, free_secs;
         int bg_node_segs, bg_data_segs;
         int tot_blks, data_blks, node_blks;
@@ -1958,6 +1958,7 @@ static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
 }
 
 #define stat_inc_cp_count(si)           ((si)->cp_count++)
+#define stat_inc_bg_cp_count(si)        ((si)->bg_cp_count++)
 #define stat_inc_call_count(si)         ((si)->call_count++)
 #define stat_inc_bggc_count(sbi)        ((sbi)->bg_gc++)
 #define stat_inc_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]++)
@@ -2040,6 +2041,7 @@ int __init f2fs_create_root_stats(void);
 void f2fs_destroy_root_stats(void);
 #else
 #define stat_inc_cp_count(si)
+#define stat_inc_bg_cp_count(si)
 #define stat_inc_call_count(si)
 #define stat_inc_bggc_count(si)
 #define stat_inc_dirty_inode(sbi, type)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index d8ad1abfa4fd..5904a411c86f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -297,6 +297,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
                 if (test_opt(sbi, DATA_FLUSH))
                         sync_dirty_inodes(sbi, FILE_INODE);
                 f2fs_sync_fs(sbi->sb, true);
+                stat_inc_bg_cp_count(sbi->stat_info);
         }
 }