[PATCH 19/19] btrfs: make smaller extents more likely to go into bitmaps

[Dennis Zhou]

It's less than ideal for small extents to eat into our extent budget, so
force extents <= 32KB into the bitmaps save for the first handful.

Signed-off-by: Dennis Zhou <den...@kernel.org>
---
 fs/btrfs/free-space-cache.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index a0941d281a63..505091940580 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2094,8 +2094,8 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl,
                 * of cache left then go ahead an dadd them, no sense in adding
                 * the overhead of a bitmap if we don't have to.
                 */
-               if (info->bytes <= fs_info->sectorsize * 4) {
-                       if (ctl->free_extents * 2 <= ctl->extents_thresh)
+               if (info->bytes <= fs_info->sectorsize * 8) {
+                       if (ctl->free_extents * 3 <= ctl->extents_thresh)
                                return false;
                } else {
                        return false;
-- 
2.17.1