2 files changed, 12 insertions, 0 deletions

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 981c34a0cd69..2879704509fd 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -462,6 +462,9 @@ static void nilfs_segctor_begin_finfo(struct nilfs_sc_info *sci,
         sci->sc_binfo_ptr = sci->sc_finfo_ptr;
         nilfs_segctor_map_segsum_entry(
                 sci, &sci->sc_binfo_ptr, sizeof(struct nilfs_finfo));
+
+        if (inode->i_sb && !test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags))
+                set_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags);
         /* skip finfo */
 }
 
@@ -887,6 +890,11 @@ static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci)
         raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime);
         raw_cp->cp_cno = cpu_to_le64(nilfs->ns_cno);
 
+        if (test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags))
+                nilfs_checkpoint_clear_minor(raw_cp);
+        else
+                nilfs_checkpoint_set_minor(raw_cp);
+
         nilfs_write_inode_common(sbi->s_ifile, &raw_cp->cp_ifile_inode, 1);
         nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, bh_cp);
         return 0;
@@ -2091,6 +2099,7 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
                 nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start,
                                        segbuf->sb_sum.seg_seq, nilfs->ns_cno);
 
+                clear_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags);
                 clear_bit(NILFS_SC_DIRTY, &sci->sc_flags);
                 set_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags);
         } else
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index fbd162d71707..bb7d417fec62 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -185,6 +185,9 @@ enum {
         NILFS_SC_SUPER_ROOT,    /* The latest segment has a super root */
         NILFS_SC_PRIOR_FLUSH,   /* Requesting immediate flush without making a
                                    checkpoint */
+        NILFS_SC_HAVE_DELTA,    /* Next checkpoint will have update of files
+                                   other than DAT, cpfile, sufile, or files
+                                   moved by GC */
 };
 
 /* sc_state */