Btrfs: Use 2MB as the empty_size for clustered allocations

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

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 9e0869959cde37bcf15f1efc51d69754ab3a870f..220e9be9ad82475a380e9c0e4b144ff9666c30b4 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1476,7 +1476,7 @@ check_failed:
        if (last_ptr && *last_ptr && search_start != *last_ptr) {
                *last_ptr = 0;
                if (!empty_size) {
-                       empty_size += 16 * 1024 * 1024;
+                       empty_size += 2 * 1024 * 1024;
                        total_needed += empty_size;
                }
                search_start = find_search_start(root, &block_group,