Btrfs: add fragment=* debug mount option

[cascardo/linux.git] / fs / btrfs / free-space-cache.c

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 5a9431d..c0eb84e 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1951,12 +1951,19 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl,
                      struct btrfs_free_space *info)
 {
        struct btrfs_block_group_cache *block_group = ctl->private;
+       bool forced = false;
+
+#ifdef CONFIG_BTRFS_DEBUG
+       if (btrfs_should_fragment_free_space(block_group->fs_info->extent_root,
+                                            block_group))
+               forced = true;
+#endif
 
        /*
         * If we are below the extents threshold then we can add this as an
         * extent, and don't have to deal with the bitmap
         */
-       if (ctl->free_extents < ctl->extents_thresh) {
+       if (!forced && ctl->free_extents < ctl->extents_thresh) {
                /*
                 * If this block group has some small extents we don't want to
                 * use up all of our free slots in the cache with them, we want