Btrfs: Fine tune the btree writeback exclusion some more

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8a74f9027d6..de0552532d2 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -214,6 +214,10 @@ static int btree_writepages(struct address_space *mapping,
                 u64 num_dirty;
                 u64 start = 0;
                 unsigned long thresh = 96 * 1024 * 1024;
+
+                if (wbc->for_kupdate)
+                        return 0;
+
                 num_dirty = count_range_bits(tree, &start, thresh, EXTENT_DIRTY);
                 if (num_dirty < thresh) {
                         return 0;