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| author | Wang Shilong <wangsl.fnst@cn.fujitsu.com> | 2014-02-01 00:42:05 +0800 |
|---|---|---|
| committer | Josef Bacik <jbacik@fb.com> | 2014-03-10 15:15:41 -0400 |
| commit | 98cfee214394a3560bd4ce3209b55a71c4267783 (patch) | |
| tree | 504a904635516ddeaf0582489e420b67b2d622fa /fs/btrfs/backref.c | |
| parent | abccd00f8af27c585be48904515bad5658130e48 (diff) | |
| download | linux-98cfee214394a3560bd4ce3209b55a71c4267783.tar.gz linux-98cfee214394a3560bd4ce3209b55a71c4267783.tar.bz2 linux-98cfee214394a3560bd4ce3209b55a71c4267783.zip | |
Btrfs: only add roots if necessary in find_parent_nodes()
find_all_leafs() dosen't need add all roots actually, add roots only
if we need, this can avoid unnecessary ulist dance.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Diffstat (limited to 'fs/btrfs/backref.c')
| -rw-r--r-- | fs/btrfs/backref.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index aded3ef3d3d4..903fe68e017b 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -965,7 +965,7 @@ again: while (!list_empty(&prefs)) { ref = list_first_entry(&prefs, struct __prelim_ref, list); WARN_ON(ref->count < 0); - if (ref->count && ref->root_id && ref->parent == 0) { + if (roots && ref->count && ref->root_id && ref->parent == 0) { /* no parent == root of tree */ ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS); if (ret < 0) @@ -1061,22 +1061,14 @@ static int btrfs_find_all_leafs(struct btrfs_trans_handle *trans, u64 time_seq, struct ulist **leafs, const u64 *extent_item_pos) { - struct ulist *tmp; int ret; - tmp = ulist_alloc(GFP_NOFS); - if (!tmp) - return -ENOMEM; *leafs = ulist_alloc(GFP_NOFS); - if (!*leafs) { - ulist_free(tmp); + if (!*leafs) return -ENOMEM; - } ret = find_parent_nodes(trans, fs_info, bytenr, - time_seq, *leafs, tmp, extent_item_pos); - ulist_free(tmp); - + time_seq, *leafs, NULL, extent_item_pos); if (ret < 0 && ret != -ENOENT) { free_leaf_list(*leafs); return ret; |