Btrfs: cache the extent tree preallocation (85e55b13) · Commits · e / devices / android_kernel_teracube_emerald

fs/btrfs/extent-tree.c

+12 −2

Original line number	Diff line number	Diff line
		@@ -741,7 +741,6 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, struct
		BUG_ON(ret);
		}
		extent_root->fs_info->extent_tree_insert_nr = 0;
		extent_root->fs_info->extent_tree_prealloc_nr = 0;
		return 0;
		}

		@@ -951,6 +950,18 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
		num_blocks = 1;
		total_needed = (min(level + 1, BTRFS_MAX_LEVEL) + 2) * 3;
		}
		if (fill_prealloc) {
		u64 first;
		int nr = info->extent_tree_prealloc_nr;
		first = info->extent_tree_prealloc[nr - 1];
		if (info->extent_tree_prealloc_nr >= total_needed &&
		first >= search_start) {
		ins->objectid = info->extent_tree_prealloc[0];
		ins->offset = 1;
		return 0;
		}
		info->extent_tree_prealloc_nr = 0;
		}
		if (search_end == (u64)-1)
		search_end = btrfs_super_total_blocks(info->disk_super);
		if (hint_block) {
		@@ -1107,7 +1118,6 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
		if (ins->objectid + num_blocks > first &&
		ins->objectid <= info->extent_tree_prealloc[0]) {
		search_start = info->extent_tree_prealloc[0] + 1;
		WARN_ON(!full_scan);
		goto new_group;
		}
		}