Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm

[platform/kernel/linux-starfive.git] / mm / page-writeback.c

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 7b0dcea..7687879 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -541,8 +541,11 @@ static void balance_dirty_pages(struct address_space *mapping)
                 * filesystems (i.e. NFS) in which data may have been
                 * written to the server's write cache, but has not yet
                 * been flushed to permanent storage.
+                * Only move pages to writeback if this bdi is over its
+                * threshold otherwise wait until the disk writes catch
+                * up.
                 */
-               if (bdi_nr_reclaimable) {
+               if (bdi_nr_reclaimable > bdi_thresh) {
                        writeback_inodes(&wbc);
                        pages_written += write_chunk - wbc.nr_to_write;
                        get_dirty_limits(&background_thresh, &dirty_thresh,