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-rw-r--r--fs/btrfs/extent-tree.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 8798fa029ebe..d68ee91c00fc 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8683,7 +8683,13 @@ skip:
parent = 0;
}
- if (need_account) {
+ /*
+ * 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) {