1 files changed, 13 insertions, 0 deletions

diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 2d04efb22eea..bc8fe963b3cc 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -877,6 +877,19 @@ static int write_ordered_buffers(spinlock_t * lock,
                 if (!buffer_uptodate(bh)) {
                         ret = -EIO;
                 }
+                /* ugly interaction with invalidatepage here.
+                 * reiserfs_invalidate_page will pin any buffer that has a valid
+                 * journal head from an older transaction.  If someone else sets
+                 * our buffer dirty after we write it in the first loop, and
+                 * then someone truncates the page away, nobody will ever write
+                 * the buffer. We're safe if we write the page one last time
+                 * after freeing the journal header.
+                 */
+                if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) {
+                        spin_unlock(lock);
+                        ll_rw_block(WRITE, 1, &bh);
+                        spin_lock(lock);
+                }
                 put_bh(bh);
                 cond_resched_lock(lock);
         }