f2fs: add to account skip count of background GC

This patch adds to account skip count of background GC, and show stat
info via 'status' debugfs entry.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index da1cabbc4973..75bc62edc4c1 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -101,6 +101,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
         si->avail_nids = NM_I(sbi)->available_nids;
         si->alloc_nids = NM_I(sbi)->nid_cnt[PREALLOC_NID];
         si->bg_gc = sbi->bg_gc;
+        si->io_skip_bggc = sbi->io_skip_bggc;
+        si->other_skip_bggc = sbi->other_skip_bggc;
         si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC];
         si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC];
         si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
@@ -355,6 +357,8 @@ static int stat_show(struct seq_file *s, void *v)
                                 si->skipped_atomic_files[BG_GC] +
                                 si->skipped_atomic_files[FG_GC],
                                 si->skipped_atomic_files[BG_GC]);
+                seq_printf(s, "BG skip : IO: %u, Other: %u\n",
+                                si->io_skip_bggc, si->other_skip_bggc);
                 seq_puts(s, "\nExtent Cache:\n");
                 seq_printf(s, "  - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",
                                 si->hit_largest, si->hit_cached,