f2fs: show the max number of atomic operations

This patch adds to show the max number of atomic operations which are
conducting concurrently.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index fbd5184140d0..29cdf0c1da1d 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -50,6 +50,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
         si->ndirty_files = sbi->ndirty_inode[FILE_INODE];
         si->ndirty_all = sbi->ndirty_inode[DIRTY_META];
         si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
+        si->aw_cnt = atomic_read(&sbi->aw_cnt);
+        si->max_aw_cnt = atomic_read(&sbi->max_aw_cnt);
         si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA);
         si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA);
         si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
@@ -256,6 +258,8 @@ static int stat_show(struct seq_file *s, void *v)
                            si->inline_dir);
                 seq_printf(s, "  - Orphan Inode: %u\n",
                            si->orphans);
+                seq_printf(s, "  - Atomic write count: %4d (Max. %4d)\n",
+                           si->aw_cnt, si->max_aw_cnt);
                 seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
                            si->main_area_segs, si->main_area_sections,
                            si->main_area_zones);
@@ -414,6 +418,9 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi)
         atomic_set(&sbi->inline_dir, 0);
         atomic_set(&sbi->inplace_count, 0);
 
+        atomic_set(&sbi->aw_cnt, 0);
+        atomic_set(&sbi->max_aw_cnt, 0);
+
         mutex_lock(&f2fs_stat_mutex);
         list_add_tail(&si->stat_list, &f2fs_stat_list);
         mutex_unlock(&f2fs_stat_mutex);