gfs2: Trim the ordered write list in gfs2_ordered_write()

We iterate through the entire ordered writes list in
gfs2_ordered_write() to write out inodes. It's a good
place to try and shrink the list by throwing out inodes
that don't have any pages.

Signed-off-by: Abhi Das <adas@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 27e97d3de1e0..b9889ae5fd7c 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -538,9 +538,12 @@ static void gfs2_ordered_write(struct gfs2_sbd *sdp)
         list_sort(NULL, &sdp->sd_log_le_ordered, &ip_cmp);
         while (!list_empty(&sdp->sd_log_le_ordered)) {
                 ip = list_entry(sdp->sd_log_le_ordered.next, struct gfs2_inode, i_ordered);
-                list_move(&ip->i_ordered, &written);
-                if (ip->i_inode.i_mapping->nrpages == 0)
+                if (ip->i_inode.i_mapping->nrpages == 0) {
+                        test_and_clear_bit(GIF_ORDERED, &ip->i_flags);
+                        list_del(&ip->i_ordered);
                         continue;
+                }
+                list_move(&ip->i_ordered, &written);
                 spin_unlock(&sdp->sd_ordered_lock);
                 filemap_fdatawrite(ip->i_inode.i_mapping);
                 spin_lock(&sdp->sd_ordered_lock);