-static int free_some_buffers(struct extent_io_tree *tree)
-{
- u32 nrscan = 0;
- struct extent_buffer *eb;
- struct list_head *node, *next;
-
- if (tree->cache_size < cache_soft_max)
- return 0;
-
- list_for_each_safe(node, next, &tree->lru) {
- eb = list_entry(node, struct extent_buffer, lru);
- if (eb->refs == 1) {
- free_extent_buffer(eb);
- if (tree->cache_size < cache_hard_max)
- break;
- } else {
- list_move_tail(&eb->lru, &tree->lru);
- }
- if (nrscan++ > 64 && tree->cache_size < cache_hard_max)
- break;
- }
- return 0;
-}
-