| Message ID | 20180907093235.28254-6-wqu@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | btrfs: qgroup: Skip unrelated tree blocks for balance | expand |
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index de6f75f5547b..4588153f414c 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -8643,7 +8643,13 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans, parent = 0; } - if (need_account) { + /* + * Tree reloc tree doesn't contribute to qgroup numbers, and + * we have already accounted them at merge time (replace_path), + * thus we could skip expensive subtree trace here. + */ + if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID && + need_account) { ret = btrfs_qgroup_trace_subtree(trans, next, generation, level - 1); if (ret) {
Reloc tree doesn't contribute to qgroup numbers, as we have accounted them at balance time (check replace_path()). Skip such unneeded subtree trace should reduce some performance overhead. Signed-off-by: Qu Wenruo <wqu@suse.com> --- fs/btrfs/extent-tree.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)