1 files changed, 21 insertions, 2 deletions

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 8b5e4778cf28..683df89dbae5 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1859,12 +1859,26 @@ static void nilfs_end_page_io(struct page *page, int err)
         if (!page)
                 return;
 
-        if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page))
+        if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page)) {
                 /*
                  * For b-tree node pages, this function may be called twice
                  * or more because they might be split in a segment.
                  */
+                if (PageDirty(page)) {
+                        /*
+                         * For pages holding split b-tree node buffers, dirty
+                         * flag on the buffers may be cleared discretely.
+                         * In that case, the page is once redirtied for
+                         * remaining buffers, and it must be cancelled if
+                         * all the buffers get cleaned later.
+                         */
+                        lock_page(page);
+                        if (nilfs_page_buffers_clean(page))
+                                __nilfs_clear_page_dirty(page);
+                        unlock_page(page);
+                }
                 return;
+        }
 
         __nilfs_end_page_io(page, err);
 }
@@ -2487,7 +2501,8 @@ static int nilfs_segctor_construct(struct nilfs_sc_info *sci,
                 if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) &&
                     nilfs_discontinued(nilfs)) {
                         down_write(&nilfs->ns_sem);
-                        req->sb_err = nilfs_commit_super(sbi, 0);
+                        req->sb_err = nilfs_commit_super(sbi,
+                                        nilfs_altsb_need_update(nilfs));
                         up_write(&nilfs->ns_sem);
                 }
         }
@@ -2675,6 +2690,7 @@ static int nilfs_segctor_thread(void *arg)
         } else {
                 DEFINE_WAIT(wait);
                 int should_sleep = 1;
+                struct the_nilfs *nilfs;
 
                 prepare_to_wait(&sci->sc_wait_daemon, &wait,
                                 TASK_INTERRUPTIBLE);
@@ -2695,6 +2711,9 @@ static int nilfs_segctor_thread(void *arg)
                 finish_wait(&sci->sc_wait_daemon, &wait);
                 timeout = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) &&
                            time_after_eq(jiffies, sci->sc_timer->expires));
+                nilfs = sci->sc_sbi->s_nilfs;
+                if (sci->sc_super->s_dirt && nilfs_sb_need_update(nilfs))
+                        set_nilfs_discontinued(nilfs);
         }
         goto loop;