1 files changed, 11 insertions, 0 deletions

diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 88c8976c55a9..f2efc8c5be7f 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -47,6 +47,16 @@ void nilfs_set_last_segment(struct the_nilfs *nilfs,
         nilfs->ns_last_pseg = start_blocknr;
         nilfs->ns_last_seq = seq;
         nilfs->ns_last_cno = cno;
+
+        if (!nilfs_sb_dirty(nilfs)) {
+                if (nilfs->ns_prev_seq == nilfs->ns_last_seq)
+                        goto stay_cursor;
+
+                set_nilfs_sb_dirty(nilfs);
+        }
+        nilfs->ns_prev_seq = nilfs->ns_last_seq;
+
+ stay_cursor:
         spin_unlock(&nilfs->ns_last_segment_lock);
 }
 
@@ -267,6 +277,7 @@ static int nilfs_store_log_cursor(struct the_nilfs *nilfs,
         nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno);
         nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq);
 
+        nilfs->ns_prev_seq = nilfs->ns_last_seq;
         nilfs->ns_seg_seq = nilfs->ns_last_seq;
         nilfs->ns_segnum =
                 nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg);